Each gemstone species has a set of observable characteristics that our gemologists are trained to observe. These include a gem's refractive index, pleochroism, optic character and spectral pattern. The capability of certain instruments to view or measure these properties, coupled with the knowledge of their proper interpretation is what makes a gemologist effective at his trade.

Here at the Gemcamp Laboratories, your gemstones are checked by our in-house gemologists that have completed their formal and advanced studies at institutions like the Gemological Institute of America (GIA) in Hong Kong and the Swiss Gemological Institute (SSEF) in Basel, Switzerland.

A LOOK AT OUR GEM EVALUATION SERVICE

While we do offer a verbal-result identification service for a more affordable rate, our main specialisation is the official lab reporting service for colored gemstones. This printed report is accomplished using a step-by-step procedure utilising the required lab equipment, research material and trade expertise needed for any certain stone. Once a client has successfully submitted a gemstone to our laboratory, we then proceed with the first phase in the series: understanding its identity. 

Every gemstone belongs to a certain species, and occasionally a specific variety of that species. Ruby for example, belongs to the species called 'corundum', and the term 'ruby' actually refers to the red variety of this species. Often times trade labels can confuse buyers about the identity of their stone, but we here at the laboratory base our results on existing gemological standards and information, which is grounded in scientific framework. It is imperative that each stone passing through our laboratory receives an identification opinion first before any formal or informal appraisal of value can be made.  

Once the identity issue is resolved, our in-house gemologist will then also look for any indication of enhancing treatments left by gem processors. These are very important as their presence deeply affects any kind of valuation for the gem material. Many stones in the trade undergo some form of treatment to improve their apparent color or clarity, however buyers are not always informed by the seller as to whether or not their items have undergone enhancements. We provide a closer understanding of how a gemstone might have been treated for improvement, as well as explain the common procedures and information associated with certain treatments.

After the first phase is complete, we can then grade stones for color. This involves measuring a gemstone's bodycolor (also called hue), along with its tone level (darkness or lightness) and saturation level (intensity or purity of color). All of these visual traits contribute to the valuation of a gemstone in the market. More desirable hues with stronger saturations often rank higher in the trade, compared to the commercial-grade stones that may seem duller in comparison. 

We must also take a look at the gem's clarity level. While most colored gemstones are actually expected to possess some inclusions, generally speaking the clearer ones tend to price higher than others. This is often the case, except for some gemstone varieties that may have special considerations or optical phenomena which require the presence of inclusions to appeal more to connoisseurs.

Color and clarity are quality factors that define a huge portion of a stone's valuation, but an exceptional stone's price can be multiplied exponentially if another factor called 'carat weight' is in the higher ranges. We speak of carat weight strictly as weight, where one carat is equal to 1/5th of a gram. The trade often links carat weight to dimensional measurements (overall size), but this is not a hundred percent accurate due to cutting variations. In any case, we make sure to verify a gemstone's carat weight using our trade scale. The final weight can at furthest be rounded off to the hundredth of a carat, as is the usual practice in our industry.

Once the three quality aspects have been measured, we can also do an assessment of cutting grade or cutting style. Many colored gemstones are usually fashioned as mixed-cuts to save weight, but sometimes we see appeal variations that must be noted to the buyer. One common example would be a bulging pavilion, often done to keep extra weight on the gemstone so that a vendor can charge a higher price for it. This does not increase the face-up measurements of the stone and can sometimes even darken its apparent color. Buyers who know more about these trade practices can make better purchasing decisions in the future.

LIMITATIONS AND SUMMARY

The Gemcamp Laboratory provides you with a professional opinion regarding the identity and quality grade of your stone, utilising the most advanced techniques, equipment and resources available to our institution at the time of stone submission. We can only provide laboratory services for clients at our current rates of convenience, due to the important liability conditions listed on our reports, which also apply to any verbal results issued for client items. While this may be the case, our conditions are competent and consistent with many of the international laboratories in the trade. Ours is a service that strives to inform and disclose gemological information with the highest degree of accuracy and data transparency applicable. 

• The laboratory is an independent gemological facility, unaffiliated with any gemstone or jewellery vendors.
• For grading terminology, we closely follow the original standards set by the Gemological Institute of America. 
• Our professional services are open to all, at personal convenient rates with terms and conditions applicable.

"Natural gemstones are very rare, especially in their exceptional qualities. Such scarcity meets with the current industry demand and thus creates value. It is always of utmost importance to know exactly what type of item you are investing your resources in."

The role of gemological laboratories is to guide the consumer in the path of identifying, verifying and grading the unique material that he or she has purchased. It is our mantra that fair trade and proper disclosure be pursued by all who do business in this very rewarding industry. Please note that laboratory terms and limitations for all services do apply whenever your stones are being safely and ethically evaluated by our gemologists. You can find them via our FAQ page here.