Types of Lab Coats Worn by Laboratory Staff

Lab coats are more than just uniforms; they play an important function in the laboratory. Their purpose is to protect your skin and clothes from chemical or biological spills. They come in a variety of styles and lengths. Laboratory staff generally wear the longer, knee length lab coats that have long sleeves to protect the arms.

Some have elastic at the sleeve ends to help prevent the sleeve from being caught on equipment while you are working. They are usually button or snap closed. Shorter coats may have zippers. Lab coats are designed to be rapidly removed in case of a spill.

Their styles vary when it comes to pockets although most versions have two large patch pockets and a small breast pocket. The pockets may be designed to hold pens upright so they can be easily accessed.

Although uniform scrubs come in a variety of colors and prints today, they have traditionally been white and most of them still are, although they can sometimes be seen in other colors like blue and green.

The lab coats that laboratory staff wear are normally made from cotton and polyester so they are comfortable and lightweight. They can be treated to be flame and chemical resistant.

Although there are various types for laboratory staff to wear today, they all have the same purpose and that is to protect you. It should always be worn when working with hazardous materials like biological samples or chemical solutions. The sleeves should be rolled down and when gloves are worn, the lab coat sleeves should be tucked into the tops of the gloves.

While they protect you from contamination, they are considered to be contaminated themselves and should not be worn out of the lab. For example, when leaving the lab for lunch or to go home for the day, your coat should remain inside the lab. Your facility may provide your lab coats and launder them as well. You may have to buy your own and launder it at home, if you do, wash it separately from your regular laundry.

If your lab requires that you buy your own coat, you will find they are very affordable. You can buy a basic unisex lab coat for under $20. Fashionable lab coats and coats specially treated to repeal chemicals may cost more.

The employer may dictate the exact type of coat worn by laboratory staff. There are a few basic types like long or knee length, short or hip length, jacket style, gowns like surgical gowns, one size fits all, and fitted lab coats.

There are also various types of coats according to material used to make them. Polyester makes the lab coat resistant to liquid spills; cotton makes them cool and comfortable. If you work in a biohazard lab, you may wear a disposable coat that is made from polypropylene. Some have carbon fibers added which increases their ability to repel fluids. Chemical resistant coats are made from cotton twill and treated with ammonia or made from fire retardant material like Nomex from DuPont.

The type of lab coat you choose will depend on the type of lab you work in. You need a higher level of protection if you work with infectious materials or dangerous chemicals.

Buy Branded Laboratory Equipment at Discounted Rates

You can buy branded laboratory equipments at genuine discounted rates online. Branded manufacturers offer a wide variety of medical laboratory equipments used for various research procedures that include measurements, experiments or for simple data gathering. These laboratory equipments ensure superior performance for longer period of time without any complaints as they are available with manufacturer’s guarantee. Also big branded lab instruments incorporate the latest technological features that help in better and faster performance

The biggest advantage of branded lab equipment is that their accessories, spare parts and consumables are easily available. Further more, the big advantage of buying branded medical lab equipments is that some companies offer post-sales services to make sure faultless functioning of their products. Therefore one should buy such branded equipments that are available at discounted rates online and also offers assured and satisfactory services.

In order to keep your laboratory expenditure within limits and yet get the best quality lab equipments, buying branded lab equipments at discounted rates is the best option wherein at low price you can get reliable products like centrifuges, chemistry analyzers, colposcopes, microscope sonicators, spectrophotometers and lab mixers. As compared to local stores, online shopping offers best discounted deals on branded medical laboratory equipments wherein you can get every kind of equipment displayed on one screen and in few clicks you can easily compare and buy top quality lab equipments.

Virtually, online stores provide huge discounts and offers on lab equipments of various brands that actually allow buyers to access variety of products and choose the best equipment according to their requirement. The online shopping stores not only have vast collection of best brands but also provide latest technologically advanced gadgets. This saves ample amount of time, energy and money as online stores present discounts on best brands all throughout the year and provides true value for the money you have invested to buy branded medical laboratory equipments. You need not go to local shops searching for right product, price and technology.

Before buying any medical equipment, it is best to access and have right information regarding specifications, descriptions and features about any product. Your privacy is fully assured online as the online stores process payments through secured transactional gateways. Moreover, online stores generally provide free shipping of the lab equipments in any part of the world.

You can get best discounts to buy branded medical laboratory equipments though online stores or online marketplaces. Online medical stores assures top discounts on best brands and convenience of selecting the right kind of medical lab equipment according to your requirement along with secured online payments and comfort of free door-step delivery.

Eraymedical offers online Online medical supplies and equipments like Physiotherapy Equipment, BP Monitors, Medical Diagnostics, Respiratory Therapy Supplies, Microscopes, Stethoscopes, Laboratory Equipment and many more for consumers, physicians and healthcare professionals at the lowest possible cost.

Five Things to Look For When Buying a Lab-Grown Diamond

Lab-grown diamonds are a beautiful alternative to mined diamonds. Not only are they every bit as brilliant, they are also eco-friendly and conflict-free. That means that you are not paying for something that funds wars or causes human suffering. Being able to wear your lab diamond with peace of mind is of utmost importance to you. You want to make sure that you’re getting the most out of your money.

With that in mind, there are some things you should look for before buying one of these synthetic beauties. Knowing what makes a lab diamond and a mined diamond similar can help you determine whether or not the stone that you are considering is worth the money that you spent on it.

The more you familiarize yourself with lab-grown diamonds, the easier this will become. You’ll know what qualities to look for. This will allow you to enjoy your ring, necklace, pendant or bracelet for years to come. One of the reasons why this is possible is because many synthetic diamond companies offer lifetime guarantees.

Here are five things you should look for when buying a lab-grown diamond:

Is it guaranteed conflict-free? Only lab diamonds are guaranteed conflict-free. Naturally mined diamonds come from ravaged parts of Africa. Land and natural resources are destroyed in the process leaving local people without clean drinking water and a means to support themselves financially. These so-called blood diamonds help fund wars and violate human rights.

Is its outer hardness similar to a natural diamond? A natural diamond has a surface hardness of 10. A good synthetic usually measures at least 9.5. Both should be able to cut glass.

What is its index of refraction? Both types of diamonds should have an index of refraction of 2.42. This makes it hard to differentiate between the two. This measurement allows you to know how much light will be refracted by the diamond.

How is it cut? Lab diamonds are cut by hand. Mined diamonds are cut based on cost. This is one of the reasons why synthetic diamonds are so ideal. A lot of time and effort gets put into making them perfect for the customer.

How is it polished? As a last step, both lab-grown diamonds and natural diamonds should be polished with diamond powder. This helps them look amazing and authentic.

Lab-grown diamonds are the obvious choice for individuals looking for an ethical, sustainable stone. One of their biggest selling points is that they can be placed in almost every type of setting. It doesn’t matter if it’s sterling silver, 24 karat gold or white gold, they look amazing in everything.

When determining which lab diamond company to go with, take a few minutes to answer the questions listed above. This will help you make the best decision as to whom you should buy yours from.

What You Should Know When Buying Medical Laboratory Equipment

A well-equipped lab with all the necessary medical instruments and devices would ensure efficiency, accuracy and promptness in laboratory procedures. To source the right kind of products, you need to be discerning when buying medical laboratory equipment for your healthcare facility.

Buying Medical Laboratory Equipment – Things to Consider

Features and specifications – Before buying medical equipment, do some thorough research about the product. Go to dealer or manufacturer websites and other reliable sources to study the features, specifications and other related facts about the product you intend to purchase. Make sure that the product you choose meets your laboratory’s specific research requirements.

Quality – The market is flooded with various brands of lab equipment. It is important that you buy the right model and good brand. Accuracy, efficient functioning and durability are important features to consider when you invest in expensive medical lab devices. So make sure you buy a quality device from a leading manufacturer. Go for products from reliable names such as Roche Diagnostics, Beckman, Clay Adams and Unico.

If you are looking at recertified equipment, your ideal option is to buy from a well known dealer that specializes in selling such devices. Reliable dealers will ensure that the used equipment they buy is put through a well-organized refurbishment process so that it functions like new. Stringent quality control will ensure that these products are revamped in a way that they meet original manufacturer specifications.

Budget – Consider your budget when you invest in expensive lab equipment. If you have budget limitations, buying recertified equipment is an ideal option as they are available at prices much lower than new, but work efficiently.

Accessories – Many of the dealers provide parts and accessories along with the products they sell. If you are buying chemistry lab equipment, make sure that spare parts are available as also reagents, controls and consumables.

Warranty – To ensure lasting performance, check out whether the medical equipment you purchase comes with proper warranty. When it comes to used products, check whether they have parts warranty.

Shipping and return policy – It is advisable to go through the shipment terms and conditions, return policy, charges and other related details to avoid complications that could arise during transport. If you notice that the product is damaged on delivery, notify the dealer immediately.

Post-purchase service – When you choose a supplier, consider post-sales support offered. A reliable dealer would offer in-house service and repair, customized on-site annual service contracts, Preventive Maintenance (PM) service contracts, and ongoing personal support services.

There are numerous medical equipment suppliers in the US. When buying medical laboratory equipment, find a one-stop-shop that can offer you all need at reasonable prices.

Buy Pre-Owned Laboratory Equipment to Meet Your Lab Application Needs

Different types of laboratory equipment are required to meet fast growing medical and research needs. Buying pre-owned laboratory equipment can help meet your lab application needs at an affordable cost. The risk of purchasing recertified lab equipment can be minimized by choosing to partner with a reputed equipment supplier.

Benefits of Buying Pre-owned Laboratory Equipment

Purchasing pre-owned products is, of course, a cost-effective option. Purchasing the devices from an established laboratory equipment supplier adds more value and benefits. The many advantages of buying recertified medical equipment are:

• Quality and accuracy: Used equipment is refurbished and refurbished through a proper re-certification process to ensure the quality and accuracy levels remain the same as the new one. Reliable equipment suppliers will have expert technicians who confirm the proper working of machine parts and perform quality checks.

• Cost: Recertified medical lab equipment is available at much lower cost than that of the brand new one, though the services that both types offer are same.

• Wide list of products: Similar to new product varieties, different brands and models of pre-owned products are available. Most reliable suppliers provide recertified equipment such as centrifuges, flow cytometers, histology equipment, chemistry analyzers, immunoassay analyzers, DNA analyzers, gamma counters, blood gas analyzers, point of care analyzers, luminometers, coagulation analyzers, and so on.

• User-friendly and durable: Renowned suppliers of lab equipment offer efficient, user-friendly pre-owned products. Recertified lab equipment also ensures durability.

• Advanced technology products: With recertified equipment, you can enjoy the advantage of advanced technology at an affordable rate.

• Easy accessibility: Online stores provide an easy option for anyone to purchase equipment online at a competitive price, without much effort. Reliable dealers have online stores with a wide variety of products and safe shipping options.

• Product warranty: Equipment for medical facilities should be chosen with care. Established lab equipment suppliers offer warranty for the used products they sell.

• Quick turnaround time: Reconditioned lab equipment can provide accurate results in quick turnaround time. Trustworthy dealers whose technicians rework on the old equipment also make sure that the reconditioned pieces provide on-time results too.

Skilled, factory-trained technicians refurbish used lab equipment. The technicians undertake the refurbishment process to make sure that the product meets the original manufacture specifications. The right medical laboratory equipment supplier will provide you with excellent customer service such as

• After sales service

• Annual maintenance contract

• In-house service

• Service visits

Locating a reliable supplier can help you to purchase superior quality devices and benefit from reliable services at affordable rates. Buying pre-owned medical equipment is therefore an appropriate solution to meet your lab application needs.

Buying Recertified Laboratory Equipment – Feasible Option for Laboratories

Buying quality laboratory equipment is important to ensure accurate, reliable and quick test results. There are many types, brands and models of advanced lab devices in the market that meet these requirements, but buying new equipment can prove to be an expensive option in these economically trying times. Rather than investing heavily in new devices, clinical laboratories have a more budget-friendly option – purchasing recertified laboratory equipment. Let’s see why this is a feasible alternative.

Save Money with Refurbished Lab Devices

Purchasing refurbished devices is an ideal option to reduce costs for budget sensitive clinical labs. Established dealers purchase used equipment and put them through a comprehensive refurbishment process to ensure the devices meet original manufacturer specifications. They are carefully inspected and made fully functional so that they offer the same product features as new. The product is then recertified as a brand new product and then offered for sale. The benefits that come with the purchase of recertified laboratory equipment are:

Lower Prices – Pre-owned lab devices are offered at lower prices than new ones. Buying new equipment with sophisticated features is an expensive option. In such cases, laboratories with budget constraints can easily opt to go in for a refurbished model of the same product which comes at a lower price than new. This can prove a great advantage for start-ups.

Comparable Performance – Pre-owned lab equipment would perform as well as new devices. The stringent refurbishment process ensures that there is no compromise when it comes to quality and performance which would be as consistent as that of a new device. Reputable lab equipment dealers conduct a detailed refurbishment process before offering pre-owned product for sale. As part of the refurbishment process, trained technicians dissemble the product and replace damaged or scratched parts and perform other procedures to ensure that refurbished product works as well as a new one. Rigorous quality checks are performed to ensure it meets the required performance standards.

Extended Warranty – An established lab equipment supplier would offer recertified centrifuges and analyzers by leading brands with extended warranty. The warranty period would be up to 3 months from the date of delivery of the product. Such suppliers may offer a 90-day parts warranty for recertified products.

Apart from the above mentioned, purchase of recertified lab equipment from a reliable supplier would ensure:

On – time delivery
After sales services
Material service visits
In-house service
Annual maintenance and repair contract

It is important to purchase recertified lab equipment only from a reputable lab equipment store. Only an established supplier will be able to provide top quality products at reasonable prices as well as efficient post-sales service.

Buying recertified laboratory equipment is a feasible option for laboratories. Block Scientific is a leading medical lab equipment supplier based in New York, providing a range of laboratory apparatus for clinical, scientific, and research applications. We offer a range of new and used recertified lab equipment from industry leading manufacturers.

Jewelry and Diamond Buying Guide: Avoiding False Claims

False claims and costly bargains: How to spot fraud and avoid misrepresentation.

There are many factors affect quality and value in diamonds. When the average person is looking at a diamond already set, it is very difficult, if not impossible, to see differences that can dramatically affect cost. For this reason, we recommended buying any important diamond un-mounted, and mounting it only after all the facts have been verified. But, you don’t have to be a “gemologist” or fear buying jewelry. If you follow a few simple steps, anyone can buy with confidence.

Four key steps to avoiding fraud or misrepresentation:

The first step is to buy from someone accessible and knowledgeable.

Sellers should have the skill to know for sure what they themselves are buying and selling. This is not to say that there are not bargains to be found in flea markets, estate sales, and so on, but you run a higher risk when purchasing in such places because of possible misinformation , intentional or otherwise. You must weight the risk versus the potential reward. In addition, before making a final purchasing decision, ask yourself whether or not you will be able to find the seller again if what you bought turns out to be other than represented. This is equally true when traveling and considering a jewelry purchase abroad.

Second, ask the right questions.

Don’t be afraid to ask direct, even pointed questions. The key to getting complete information about what you are buying is asking good questions so you can be sure you are aware of important factors affecting quality and value.

Third, get the facts in writing.

Be sure the seller is willing to put the answers to the questions you ask, and any representations made about the gem or jewelry you are considering, in writing. If not, we recommend against purchasing from this seller unless there is an unconditional return policy which allows merchandise to returned within a reasonable period of time for a full refund (not a store credit).

Finally, verify the facts with a gemologist appraiser.

It’s especially important to verify whatever has been put in writing with a professional gemologist appraiser. Some unscrupulous dealers are willing to put anything in writing to make the sale, knowing that written assurances or claims about the stone are often sufficient to satisfy buyers’ doubts. So this last step may be the most important to ensure you make a wise decision.

Types of Misrepresentation

Beware of bargains!

Diamonds represented to be better than they are

Beware of bargains. Most are not. When a price seems too good to be true, it unless the seller doesn’t know its true value (which reflects badly on the seller’s expertise).

Scams involving appraisals prior to sale

Beware of jewelers no willing to put the facts in writing, but who offer to let you take the stone, to an appraiser in the neighborhood. This may be a scam.

One must always be careful of recommendations from the seller. While legitimate jewelers usually know better than anyone else who the best gemologist appraisers are in their communities, and their recommendations should be respected, you must still be sure to check the credentials should be respected, you must still be sure to check the credentials yourself to avoid such scams.

In general, you need to guard against fraud or misrepresentation in one of the following four areas:

Weight misrepresentation

Color alteration and misgrading

Flaw concealment and misgrading

Certification, alteration and counterfeit certificates
Weight

Giving “total weight” of all stones where more than one is involved, rather than the exact weight of the main stone, is another form of misrepresentation. This is in strict violation of federal Trade Commission (FTC) rulings. I giving the weight, particularly on any display card, descriptive tag, or other type of advertising for a particular piece of jewelry, the weight of the main stone or stones should be indicated as well as the total weight of the all the stones.

Color

Enhancing color artificially

Touching the culet, or side of a slightly yellow stone with a coating of purple ink, such as found in a indelible pencil, neutralizes the yellow, producing a more white looking stone. This can be easily detected by washing the stone in alcohol or water. If you have ay questions about the color, tactfully request that the stone be washed (in front of you) for better examination for better examination. A reputable jeweler should have no objection to this request.

Improving the color by utilizing a sputtering technique (also called “painting” the diamond). This involves sputtering a very thin coating of a special substance over the stone or part of the stone, usually the back, where it will be harder to detect when mounted. The girdle area can also be painted with the substance and create the same effect. The substance, like indelible pencil, also neutralize the yellow and thereby improves the color by as much as seven color grades, but unlike indelible ink, the substance will not wash off. It can be removed in two ways: by rubbing the stone briskly and firmly with a cleanser, or by boiling the stone carefully in sulfuric acid. If the stone is already mounted and is coated on the back, using cleanser is not feasible. The sulfuric acid method is the only way. But please note, using sulfuric acid can be extremely dangerous, and must be done only by an experienced person.

This technique is not frequently used, but stones treated in this manner do appear often enough to be worth mentioning.

Coating the diamond with chemicals and baking it in a small lab type oven. This technique also tends to neutralize some of the yellow, thereby producing a better color grade. This coating will be removed eventually by repeated hot ultrasonic cleanings, which will gradually erode the coating. A more rapid removal can be accomplished by the more dangerous method of boiling in sulfuric acid.

Radiation treatment. Exposing off color diamonds such as yellowish or brownish tinted stones (and also badly flawed stones in which the flaws would be less noticeable against a colored background) to certain types of radiation can result in the production of fancy colored stones. This treatment produces rich yellows, greens, and blues, and greatly enhances salability because these colors are very desirable. In and of itself, radiation is not fraud; it may make a fancy color diamond affordable to someone otherwise unable to purchase one. But again, just be sure that the stone is properly represented and you know what you are buying, and that you are getting it at the right price, which should be much lower than that of the natural fancy.

Treated diamonds must be represented as “treated diamonds” and should be priced accordingly. Whether the color is natural or treated can be provided by a gem testing laboratory. Not all gemologists, however, are competent with spectroscopic procedures, and some fancy color diamond require examination with very sophisticated equipment not available to most labs. Most natural fancy colored diamonds sold by jewelers in the United States are accompanied by a GIA diamond report.

Clarity enhancement and flaw concealment

Clarity enhancement

Be especially alert to the possibility that clarity may be enhanced. The two most frequently used techniques are lasering inclusions and filling the fractures. In both cases, dark inclusions or cracks which might normally be visible, in some cases, very visible, are concealed, or become much less noticeable. Be sure to ask whether or not the stone has been lasered or filled. As long as you know, and pay the right price, a clarity enhanced diamond may be an attractive choice.

Flaw concealment

Where possible, flaws are concealed by their settings. The good stone setter will try to set a stone in such a manner that the setting will help to conceal any visible imperfections. For this reason flaws near or at the girdle will downgrade a stone less than those found in the center of the stone; since most settings cover all or part of the girdle, they are simply less visible here. Indeed, a setting can make a flaw “invisible.”
There is nothing fraudulent in such uses of settings as long as the stone is properly represented. The only danger is that not only the customer but also the jeweler may not have the imperfection concealment by the setting.

Can concealment affect value? In most diamonds other than FL or IF, the presence of a minor flaw concealed under a prong will not affect the price significantly. However, given the difference in price between diamonds graded FL or IF and VVS1, a minor blemish or inclusion hidden by the setting which might result in a VVS1 diamond being graded FL could have a significant affect on value, especially if the stone has exceptionally fine color. For this reason diamonds should be viewed UN-mounted.

Certification of diamonds

Most diamonds weighting one carat or more are carefully evaluated prior to being set by a respected laboratory such as the GIA or the AGL, and are issued a diamond grading report. That report both certifies the diamond as genuine and describes it, providing important information as color grade, flaw grade, weight cutting and proportioning, and so on. If you are considering the purchasing of a very fine diamond weighing one carat or more and it is not accompanied by such a report, we would strongly recommend that you or the seller have the stone evaluated by the GIA or another respected laboratory prior to purchase. You should do so even if it means having a stone that is already set removed from the setting and reset. Given the significant difference in cost that can result from a grading error in the rarer grades, we believes this procedure is worth the inconvenience and expense.

Unfortunately, the confidence of the public in diamonds accompanied by the certificates has given rise to the practice of altering and counterfeiting them. While you can be relatively sure that “certificated” diamonds sold by reputable, established jewelry firms are what they claim to be, there are some suppliers and dealers who are seizing opportunities to prey on the unsuspecting.

Altering certificates

Sometimes information is changed on an otherwise valid certificate; for example, the flaw or color grade may be altered. If you have any question regarding information on the certificate, a phone call to the lab (or its web site) giving them the certificate number and date will enable you to verify the information on the certificate.

Counterfeit certificates

Producing a certificate from a nonexistent lab is an increasingly common problem. Stones accompanied by fancy “certificates” from impressive sounding labs that don’t exist are appearing more and more frequently. If the certificate is not from one of the recognized labs, it should be carefully checked. If the lab seems legitimate, call to verify the information on the certificate, and if all seems in order, you can probably rest comfortably. Otherwise, you may need to have the facts verified by another gemologist or recognized lab.

Switching the stone described on a report

In some cases the report is bona fide but the stone has been switched. To protect both the consumer and the lab, some labs are taking advantage of ingenious techniques to ensure against switching. For example, a service called gem-print utilizes laser technology to display a diamond’s unique pattern of reflection and then records it photographically. The result is an electronic “fingerprint” of the diamond which can be used for identification purposes. In addition, the GIA can now actually inscribe its report number, which is visible only under magnification, directly onto the diamond itself, along the girdle. By so doing, on can very easily be sure a specific diamond matches a specific certificate simply by matching the numbers.

In the absence of such a mark, one clue to a switched diamond might be provided by comparing the carat weight and dimensions given on the report. If the measurements and carat weight match exactly, the probability is slim that a diamond has been switched, provided the report has not been altered.
If the stone has been mounted, it may be difficult to get precise measurements to compare.

Always make sure, for both your protection and the jeweler’s, that the jeweler writes down on the bill of the sale or memo all the stone’s dimensions as best as can be determined: diameter or length and width, depth, and weight. This is to help ensure that you are not accused of switching the diamond after leaving the premises in the event you must return it.

Is it a diamond or a diamond imposter?

How can you tell if a stone is really a diamond? Unless, you are an expert, or consult one, you can not be sure about the identification of a stone. Nevertheless, there are a few simple tests you can perform that will show up most diamond imposters quite quickly. Here are a few things to look for:

Is newsprint readable or observable through the stone?
If the is a round modern cut stone and is loose or mounted in such a way as to allow you to place it table down over some small newsprint, check whether you can see or read any portion of the lettering. If so, it is not a diamond. Refraction of light within a genuine diamond is such you will not be able to see any of the letters in the newsprint.
Is the stone open or closed?
Diamonds are seldom glued in. Rhinestones often are.
Is the back open or closed?
If the stone is a properly set diamond, the back of the setting will usually be open, allowing you to readily see a portion of the pavilion. Some very small rose cut or single cut diamonds, as seen in some unique jewelry, Any be mounted with a closed back. Otherwise, if a ring has a closed back, it is probably rhinestone, in which case the back is often closed in order to conceal the foil that has been applied to the back of the stone.
How many facets are visible on the top?
In cheaper glass imitations only 9 top facets are usually visible, as opposed to 33 visible top facets in a diamond or good simulation. Single cut or Swiss cut diamonds will also show only 9 facets on the top, but they will be set in open back mountings, whereas cheap glass imitations are usually set in closed back mountings.
Does the girdle of the stone appear to be frosted?
The girdles of most diamonds are unpolished, with a ground glass like appear that suggests “frostiness.” The re are some diamond imitations that also have a frosted appearance, but of all of these, a diamond has the whitest frostiness, like clean, dry, round glass. On the other hand, some diamonds do have polished or faceted girdles, and thus no frostiness will be present. You can develop an eye for this by asking a reliable jeweler to point out the differences between a polished girdle, an unpolished girdle, and a faceted girdle.
Is the cut symmetrical?
Since diamond is so valuable and symmetry so important to its overall appearance and desirability, the symmetry of faceting on a diamond will be very carefully executed, whereas in diamond simulations the symmetry of the facets may be sloppy. For example, the eight kite shaped facets (sometimes called bezel facets) will often be missing one or more points on the side, or on the top or bottom, showing a small straight edge rather than a point. This sloppy faceting can be an important indication that the stone in question is not a diamond, since it indicated that a cutter did not take proper care. It should be noted that some poorer grade or old cut diamonds may also show sloppiness
Are the crown and pavilion of the stone properly aligned?
While occasionally a diamond may show partial misalignment, imitations are frequently and often badly misaligned.
Are the facet or faces scratched, chipped, or worn?
Diamond imitations include some stones that are very soft and/or brittle, such as zircon, GGG (a man made simulation), Fabulite (a man made diamond simulation also know as Wellington Diamond), and glass. Due their lack of hardness and, in the case of zircon, possible brittleness, these imitations will show wear easily, and one can often detect scratches or chips on the facet edges or faces. The edges are somewhat more vulnerable and scratches or chips may be more easily seen there, so check the edges first. The check then flat faces for scratches. Check both the area what would be most exposed and areas around the prongs, where a setter might accidentally have scratched the stone while setting it.
Zircon, a stone found in nature that is often confused with cubic zirconia (CZ), a man made imitation, is relatively hard but very brittle, so it will almost always show chipping at the edges of the facets if the stone has been worn in jewelry for a year or more.
Some diamond look-alikes, however, are more durable and resistant to noticeable wear. These include colorless synthetic spinel, colorless synthetic sapphire, colorless quartz, YAG (man made), and CZ. While these may scratch or chip over time with regular wear and daily abuse, scratches or chips are as numerous, and will be less noticeable.
Does the stone, loose or mounted, exhibit fluorescence under ultraviolet light?
This is not something readily accomplished by an amateur, nor comprehensible to the average person because of numerous variables and scientific complexities. If, after the above tests, you still have doubt, take the stone to qualified gemologist with lab facilities and ask him to identify the stone. If it is a diamond, have him note the nature of the stone’s fluorescence, as it can prove a valuable tool for identification if ever needed.
An important word about cubic zirconia

Cubic zirconia (CZ) is the best diamond simulation made to date, and even some jewelers have mistaken these stones for diamonds.
CZ is almost as brilliant as diamond, has even greater fire (which masks its lesser brilliance), and is relatively hard, giving it good durability and wear-ability. CZ is also being produced in fancy colors; red, green, and yellow, and can provide a nice diamond “alternative” as a means to offset or dress up colored stones in jewelry if diamond are not affordable.

How can you tell if you have a CZ?

Some of the tests already discussed may help you detect a CZ. The following may eliminate any remaining doubt.

If it is a loose stone, have it weighted.

A loose stone can be weighted on a scale, which most jewelers have handy, and you can determine how much it should weigh if it is truly a diamond. If the weight is much greater than the diamond weight should be, based on its spread, then it is not a diamond. A CZ is approximately 75% heavier than a diamond of the same spread. For example, a CZ that looks like a 1 carat diamond size-wise will weigh 1-3/4 carats; a CZ that looks like a1/4 carat diamond in terms of size will weight approximately 40/100 carat.
Look at the girdle.

If the girdle is frosted, a subdued whiteness resembling slightly wet or oiled frosted glass will indicate CZ. Looking at girdles to differentiate between the appearance of frosted CZ and frosted diamond girdles requires considerable experience.

Test the stone with a carbide scriber.

CZ can be scratched with a fine-point carbide scriber, also available at most jewelry supply stores. If the scriber is forcibly pushed perpendicularly to any of the facets (the table being the easiest) and then drawn across this flat surface, you will scratch it. You can not scratch a diamond except with another diamond. But be sensible and considerate. Do not heedlessly scratch merchandise that doesn’t belong to you; particularly if the jeweler or seller doesn’t represent the stone as a diamond.
Examine the stone, loose or mounted, for fluorescence.
Both CZ and diamond fluoresce, but the colors and intensities will be different.

Use an electronic diamond tester.
These are pocket size diamond testers which will tell you what you whether or not you have a diamond. Most won’t tell you what you have if it’s not diamond, but only confirm whether or not it is diamond.
After these tests, if you have some questions, take the stone to a qualified gemologist with lab facilities for positive identification.

Comparing diamond prices

All too often people look for easy answers to complex problems. Many would like to have a simple list of diamond grades and corresponding prices, by size. Unfortunately, market conditions are constantly changing, and more important significant differences in quality not readily discernible to any but the professional. Therefore, it is not possible to provide a simple answer to this complex question.

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Build Your Own Cisco Home Lab For Newbies

You can start building your own Cisco home lab using many simulators available out there on the internet, but nothing like the real Cisco devices.

Imagine to have Cisco devices in your own LAN, awesome. And also, having a real hand experience on configuring Cisco devices can surely boost your chance passing the Cisco certification exam.

If you have more budget in your hands, then go for it, buy used Cisco routers and switches. You can get them at a really affordable price – compare to the real new Cisco price, you’re looking at a price above US$ 1,000 for one device.

From a used Cisco sellers you can get discounts up to 90% or more. Even though they’re used devices but Cisco devices are tough, yet you still have to be careful when buying, check the sellers reputation first, and make sure you have warranty at minimum 6 months.

Then which devices should you get, there are many Cisco devices out there. If you need these devices on your own lab for the CCNA exam, the key is to know what topics are tested at the exam.

Lets see, you definitely need routers and switches, you’re need at least 2 routers and 2 switches.

Routers

Having 2 routers allows you to simulate routing protocols, and 2 switches let you practice on VLANs, VTP, etc.

The best router for Cisco CCNA home lab I think is the 2611 router, they’re cheaper than others, it has slots that let you to add expansion cards if you need to upgrade your router to enable VOIP, WAN, etc.

The 2611 can cost you from not more than US$80 to 200 depends where you buy them.

If you have more money, you can buy the WIC-1T module (US$ 30 – 50) to simulate WAN in your network. The CCNA exam will test you on WAN protocols, in my opinion, to have the WICs are not too essential, but if feel like it, then go for it.

To complete your WAN environment, you can get additional 2523 router at less than US$ 100. This router can act as Frame Relay Switch. So you can pretend to be an ISP in your LAN that connects two different routers located half way around the world, cool.

Switches

Next thing is the switch, you don’t need a great Layer 3 switches for the CCNA exam, plus it can cost more than US$ 500 each.

You can buy something like Catalyst Switch 2924 or 2950, they should be enough for the exam. 12, 24, or 48 ports? it’s all up to you.

What you need to concern when you buy the switch is that you have to check all the ports on that switch, sometimes few of the ports got damaged.

Cables

Another important things, but often forgotten by used Cisco first buyers are the cables. Make sure the seller provide you with the power cable and console cable for configuring the Cisco devices.

One end of this console cable is RJ45 that you plug into the Cisco devices and at the other end is the serial port for your PC’s serial port.

You can make your own console cable, but it is much more convenient to get it from Cisco.

If you will use the WIC cards, then you’d need the DB-60 crossover cables, you plug in this cable at the WIC card back-to-back to another router.

Access Server / Routers

You don’t really need access server in you LAN, but it is so convenient that one day you’d need them anyway.

Access servers allow you to connect to all Cisco devices in your network without having to plug and unplug the console cable between routers and switches.

You can buy the 2500 series routers (2509, 2510, 2511, or 2512) for access servers, you also need to get the octal cable.

Octal cable is a cable that has one serial port at one end where you plug it to your router’s asynchronous port and at other end is not one but 8 RJ45 console cables.

With only one octal cable you can control up to 8 Cisco devices.

That’s it, many people will suggest different devices for your Cisco lab, it’s really up to you and your budget. When you’re lucky enough you can have a pretty complete Cisco home lab for under US$ 1,000 and I need to tell you that many people out there selling what is called Cisco lab kit. Cisco lab kits are sets of Cisco devices usually for certification purpose, they have from lab kits for CCNA until CCIE, and the important thing is that they sell them with pretty good price.

You can find more about building Cisco home labs from my blog Networking Newbie, thank you for visiting.

Where to Buy Top Quality Medical Laboratory Equipment and Supplies

To make a high quality medical laboratory, it is essential to buy top quality medical laboratory equipments which will help to maintain standards and control hygiene of the same. It is essential that these equipments perform with adequate monitoring, good control measures and correct standards. In particular they should also be reliable, durable and safe to use. The right source from where you can buy top quality medical laboratory equipments are the online medical stores as they provide these lab supplies at right price and that too with the assurance of fast and efficient service.

Laboratory equipments and supplies include tools and equipments which are usually used by scientists while working in a laboratory and are generally used for either performing experiments or are used for gathering and measuring data. The medical lab equipments and supplies are glass wares and plastic wares which include microscopes, centrifuges, lab mixers, differential counters, moisture analyzers, spectrophotometers and many more. Buying high quality medical lab supplies ensures that they have been manufactured with good quality material, meet recognized quality standards and thus are resilience and have the ability to withstand the adverse conditions during the experiments.

The online medical stores are undoubtedly the best source for the product selection and purchasing of the lab equipments. There is a long list of online medical websites and a showcase of various models which provide full assistance to the medical practitioners to find the top quality lab equipments and supplies they need. These websites also include the item descriptions, equipment costs and all the necessary technical information so as to make the task less tedious for the consumers. Also there are online reviews which provide cues to the reliability of the product.

There are a large number of medical lab equipments suppliers which are operating worldwide. To buy the top quality medical lab equipments and supplies, the suppliers should be chosen carefully. For this you just have to browse through the online directory of the various suppliers and you will get all detailed information under one roof. This makes the selection process even easier as the buyers can compare the prices and features of different kinds of medical lab supplies and can locate the well-established online lab equipments suppliers. The well-established suppliers offer laboratory supplies of premium quality which give durable performance and deliver good results. Some suppliers even offer heavy discounts when products are purchased in bulk from them.

A Few Tips on Selecting Lab Equipment for Your Needs

Purchasing the right kind of lab equipment can be a challenging task for lab professionals. Prompt and accurate results for laboratory tests mainly depend on the quality of lab equipment used. Leading manufacturers offer innovative lab devices incorporated with advanced technical specifications and functionalities. Analytical devices that ensure high performance can provide accurate and timely results for diagnostic procedures. Moreover, it is very important to buy quality instruments to enhance lab productivity and workflow. Here are some key factors to consider while purchasing lab instruments:

Laboratory Equipment: Considerations to help make the Purchase Decision

Brand and Quality – Before purchasing medical lab equipment, it is important to collect details about the brands and models of various lab devices available in the market. Leading manufacturers offer premium quality models of equipment for specific applications. It is necessary to choose the right model to meet your lab’s specific needs. Choosing a product from a top brand would ensure operational efficiency, durability and quality. Some of the leading manufacturers of superior quality lab devices and related products are Thermo Scientific, Beckman Coulter, Roche Diagnostics, GenWay Biotech, Medica, GONOTEC, Phoenix Diagnostics and more.

Product Specifications and Features – Before buying a particular device for laboratory, it is essential to conduct a detailed evaluation about the technical specifications and features of the product. Compare the features of two different brands or models and choose the one that can best serve your requirements. The lab device should fit into your lab space as well. So if you have space constraints, look for benchtop models. Popular brands offer bench top models of analyzers, centrifuges and other equipment which save space while performing as well as bigger-sized devices.

User Friendliness – The laboratory appliance you purchase should be user-friendly. It is imperative to check whether the specific product features supports the different procedures performed in the laboratory. The equipment should be easy to operate and ensure user safety. Labs that have staff constraints can go in for advanced automated instruments that save time required to perform laboratory tests and require less user intervention as well.

Budget – Before investing in laboratory equipment, consider your budget. Search online to find a laboratory equipment supplier that ensures competitive pricing. Often, top suppliers make special offers and discounts to help labs purchase high quality appliances at prices that are up to 50% lower than the original price. Purchasing new lab devices can prove an expensive option. Labs with budget constraints can buy re-certified lab appliances. These are used or returned devices which are put through a comprehensive reconditioning process and rigid performance stability analysis to ensure that they work as well as new. These devices are offered at prices much lower than new, but perform just as well. Some lab equipment stores also offer a reagent rental plan so that the lab need not pay upfront for the equipment. Payment is spread out over installments based on the number of tests conducted every month.

Warranty and Post-sales Support – It is essential to check the warranty period offered for the lab equipment. Proper product warranty helps when it comes to resolving issues related to operational flaws (if any), claims for breakdown for equipment parts and whole device breakdown. Recertified products also come with extended warranty for parts. Reputable medical equipment distributors offer quality after-sales support, customized on site annual service contracts, and in-house service and maintenance plans.

Find a right and reliable dealer

Choose a reliable lab equipment dealer supplying top quality lab equipment. This will ensure that you can choose from a vast collection of branded instruments. Ensure that the supplier can also provide the requisite reagents and consumables. Check out if shipping is prompt and safe. With the right partner, you would also benefit from guidance to select your device, installation, training and excellent after-sales service.