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Frequently Asked Questions
Understanding our Reports
Q1 What does Natural Gemstone/ Diamond mean?
If you see the word "Natural" when talking about the gems or diamonds, it means that your stone was formed naturally under the Earth, and not synthetic, which means it is man-made material, grown in laboratory.
Q2 Why is a professional gemological laboratory report important for your stones?
Today's gemstone market is full of different kinds of synthetics and imitations. Sometimes even traders don't know what they actually have. It is considered to be deceptive practice if a synthetic gem material is not disclosed at the time of sale. Industry organisations such as the International Colored Gemstone Association and the World Jewellery Confederation (CIBJO) have guidelines for their members regarding the disclosure of synthetic gems at the time of sale.

Therefore, to protect yourself and to ensure that your investment in gemstones is relevant, always request for a gemological report from a trustworthy independent professional gemological laboratory before you buy. Alternatively, get the seller to agree upfront for a refund/exchange if after you purchase the stone and the results from the laboratory turns out to be not what the seller represented or claimed it to be.
Q3 What is the difference between a Lab Gemologist and other Gemologists such as those associated with Jewelry shops?
There are many different activities in gemological field, such as mining, cutting, trading in jewelry and etc. People who has gemology education background (such as from GIA, Gem-A of UK and etc) consider him or herself as a gemologist. Lab gemologists are gemologists who works in a gemological laboratory environment and uses scientific methods and gemological equipment to identify a stone, its treatment, origin and/or its grade.
Q4 What is Enhancement or Treatment?
Enhancement, also known as Treatment, is commonly applied to many natural gemstones. It is any additional process other than cutting and polishing that improves the gemstone's appearance and/or durability. Global Gemological Laboratory provides disclosure notes and information on detected enhancement. Enhancement Disclosure Notes are attached together with our Report. An electronic copy can also be found at the bottom page of our online Report of your stone.
Q5 What does Insignificant, Minor, Moderate, Significant means for Emerald treatment?
This is a judgment of the degree of clarity enhancement. Due to the properties of emerald, natural emeralds are usually fractured to either a greater or lesser degree. As such, emeralds are commonly enhanced in order to improve their clarity by reducing the visibility of fractures through the use of different fillers. Fillers can include oil, wax, natural and artificial resin. "Insignificant" means the clarity enhancement has a very slight effect on the appearance, whereas "Significant" is much more obvious.
Q6 What does H, H+GF and etc mean in Treatment line of our Report?
We use such kind of abbreviations to describe the treatment of the stone. Please read the Enhancement Disclosure Notes available on our website under online report of your stone.
Q7 What is composite Ruby/Sapphire?
Composite Ruby/Sapphire is corundum that filled with high degree of glass which sometimes gives the color to the stone.
Q8 What is Type A / Type B / Type C Jadeite?
There are several types of Jadeite. Type A refers to Natural Jadeite without treatment, could be polished with wax. Type B, Type C and etc refer to different types of treatment applied on the Natural Jadeite. For further details, please refer to Enhancement Disclosure Notes available on our website under online report of your stone.
Understanding our Examination Procedures
Q9 Can I submit mounted stones and/or diamonds to Global Gemological Laboratory for testing?
Yes, in most cases, Global Gemological Laboratory could perform the analysis needed for Gemstone Identification and Diamond Grading report on mounted stone.
Q10 How long is the examination procedure?
The examination, grading and certification normally will take about 45 minutes up to 5 working days, depending on the current job queue at our laboratory and the number of stones to be examined. To reduce waiting time, clients are advised to contact us to make prior appointment or booking in advanced.
Q11 How does Global Gemological Laboratory test colored stones?
Gemstones are required to be tested with standard and advanced gemological instruments to obtain a conclusive result. In Global Gemological Laboratory, a gemologist will do all the processes that needed to get the result, and the process will be repeated and checked by another gemologist ensuring testing results are to the highest professional gemological standards.
Q12 Does Global Gemological Laboratory grade filled Diamonds?
No, Global Gemological Laboratory does not grade filled Diamonds, because diamond filling is not a permanent treatment, as time goes by, the filler could be removed and this would affect the grading result of the filled diamond.
Value and Quality of Gemstones
Q13 How much is my Ruby worth?
Depending on the quality of Ruby, its value can range from a few dollars per carat to hundreds of thousands of dollars per carat.
Q14 Are Emeralds from Colombia worth more?
Every mine produce stones of a different range of quality. The fact that gem comes from a famous mine does not mean it is high quality piece. But in the market, fine quality emeralds that have report of Colombia origin from an independent laboratory will receive higher prices.
Q15 Does heat treatment affect the value of Ruby or Sapphire?
Most of the Rubies and Sapphires on the market are heated (around 95%). Unheated stones receive higher prices due to its rarity.
Q16 What is AAA quality Gemstone?
Although some companies create their own quality descriptions, like AAA, AA, A to describe the range of quality of their stones, it's not standardized worldwide.
Q17 Does Global Gemological Laboratory perform valuation or appraise diamonds and gemstones?
As a professional gemological laboratory and in accordance with international gemological practices, Global Gemological Laboratory does not provide appraisal for items submitted to us for testing. Our gemological reports describe vital characteristics of the gemstone or diamond which will be very important for appraisal or valuation. Jewellers and Gemstone Traders will decide how much is the value or their offer price for that item after seeing our gemological report.
Safety, Client Confidential and Acceptance
Q18 Will my Gemstones and diamonds be kept safe and private?
Global Gemological Laboratory takes security, privacy & confidentiality of our clients very seriously. Our laboratory is located at a secured Grade A office building, with added security and safety features in our laboratory itself. Our clients include many established Jewellers and Gemstone Traders in Malaysia and Singapore. Should you wish to know more about our General Terms & Conditions, kindly contact us for details.
Q19 How can I verify my Global Gemological Laboratory report is real?
You can verify your report by scanning the QR code on your report, or key in the Report number online in our website https://www.globalgemological.com/report-check. Kindly ensure that website is exactly the same website. Should you have any doubt or if you suspect that your Report is not genuine, kindly alert us immediately.
Q20 Are your Reports / Certificates recognized and acceptable worldwide?
Global Gemological Laboratory is a registered laboratory and is recognized by the Federation of Goldsmiths & Jewellers Associations of Malaysia. Our group of certified international professional lab gemologists comprise members from GIA (GG) of America, Gem-A (FGA) of UK and AIGS (AG) of Asia. Our reports are also used by Gems & Jewellery Traders from Malaysia, Singapore, Indonesia, Sri Lanka and Myanmar in exporting their gemstones & jewelries worldwide.
Q21 Where can I submit my stones?
You can submit your stones to our Kuala Lumpur laboratory at the following address:
SO-22-8, Strata Office,
Menara 1 KL Eco City,
Jalan Bangsar,
Kg. Haji Abdullah Hukum,
59200 Kuala Lumpur, Malaysia.
Clean & Care for Gem Stones
Q22 How to clean my Ruby or Sapphire?
Generally, Ruby or Sapphire is very durable, it doesn't require much precautions and it is safe to use in jewellery dips. However, if the stone is fractured to some degree or has been treated, there are some care and caution. Avoid direct heat and acids if the stone is filled. Also, avoid ultrasonic and steam cleaners if the stone is heavily fractured or lead-glass filled. Lastly, avoid polishing if the stone is diffused or coated. No matter which treatment the stone has gone through, it is safe to clean your stone with mild soapy water and a soft brush.
Q23 How to clean my emerald?
As most emeralds contain filled fractures, it's risky to clean them ultrasonically or with steam. Ultrasonic vibrations can weaken already-fractured stones, and hot steam can cause oil or unhardened resin to sweat out of fractures. Using warm, soapy water coupled with gentle scrubbing is the safest way to clean emeralds.
Q24 Is there any care needed for Fracture Filled (GF, FF, FH) gems?
For Fracture Filled gems, avoid any expose to heat and chemicals. To clean such stones, use mild soapy water and a soft brush. Ultrasonic and steam cleaners are strictly prohibited.
Q25 Is there any care needed for diffused, coated, or dyed gems?
For such kind of stones, re-polish and recut can remove the color. Coating and dye could be scratched off. And don't expose coated and dyed gems to any chemicals or heat.


SO-22-8, Strata Office,
Menara 1 KL Eco City,
Jalan Bangsar,
Kg Haji Abdullah Hukum,
59200 Kuala Lumpur, Malaysia.