Diamonds' certificates are a highly sought after piece of paper that most diamonds have. This piece of paper is simply a diamond grading report which displayed the characteristics of the diamonds, in terms of Color, Cut, Clarity, Culet, Fluorescence and so forth. This certificate will allows consumers to preview the qualities of diamonds before purchasing them. The certificates can also be a real advantage when trying to resell the diamonds as they give people assurance that the diamonds are real and of certain characteristics.
GIA
GIA (Gemological Institute of America) and AGSL (American Gems Society Laboratories) are the two most established and well known Diamond Grading Laboratories.
GIA was established in 1931 and it is the largest and most established non profit institute of gemological research and learning. With over 900 employees consisted of diamond graders,
scientists and educators, they are considered to be the foremost authority in the gemology.
GSL
American Gem Society Laboratories (AGSL) is the second most respected diamond grading laboratory. The laboratory was founded in 1996 and they implement a new type of grading report by issuing DQD (Diamond Quality Document), the first and only report to ever grade on diamond cut, Diamond Quality Report (DQR) and the Diamond Consultation (DC).
IGI
International Gemological Institute is another diamond grading laboratory that was founded in 1975. The company employs over 350 scientific technicians and gemologists that examine thousands of colored stones and jewelry items every year.
IGI has established bases of operations in eight vital industry locations throughout the world. Five cities have achieved preeminence in the international diamond and gemstone market. They are Antwerp, New York, Bangkok, Mumbai and Tokyo.
Here is a full list of all known Diamond Certificate issuers in the world:
GIA - Gemological Institute of America (United States)
AGS - American Gem Society (United States)
EGL - European Gemmological Institute (Antwerp & London)
IGI - International Gemmological Institute (Antwerp)
HRD - Diamond High Council (Antwerp)
ADL - Antwerp Diamond Laboratory (Antwerp)
AGA - American Gem Apraisal Laboratories (United States)
GII - National Gemological Institue of Israel (Israel)
CIB - CIBJO (Europe)
GIL - Gem Information Laboratory (United States)
CSA - Jewellery Council of South Africa (South Africa)
GTL - Gem Testing Laboratory of Great Britain (United Kingdom)
DGL - Diamond Grading Laboratories (London)
NGL - Northern Gemmological Laboratories (United Kingdom)
EGI - European Gemmological Institute (Antwerp)
HRG - Heinz R Gartner, DGemG, FGA (Germany)
PNF - P N Ferstenberg Pbv A (Germany)
GAG - Gesellschaft fur Angewandte Gemmologie (Germany)
PSL - Precious Stone Laboratory (London)
GAN - Gemological Institute of Antwerp (Antwerp)
VPT - Verena Pagel-Theisen, DGemG FGA (Germany)
WG - Werner Galia, DGem, (Germany)
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