Intensive Short Course
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Books for Sale.
Colored Diamond Grading course
The Asian Institute of Gemological Sciences Laboratory and GGTL announced today that they are joining forces to form the Gem Alliance, a cooperation based on the sharing of information and gemological data.
Enjoy a short video documenting our latest school field trip to Chanthaburi where we saw mining, cutting, and the famous gem market.
The Asian Institute of Gemological Sciences (AIGS) announced today a cooperation with the Natural Color Diamond Association (NCDIA) in launching NCDIA Asia, which will be located at the Jewelry Trade Center in Bangkok.
World Ruby Forum 2017
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Enroll & Pay 4 Months in advance to get a FREE field trip to Sri Lanka
With synthetic diamonds becoming increasingly common within the marketplace, our testing service takes the risks out of diamond purchasing