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Opal Links

Opal Sites
Opals Down Under Opals from Australia

Laboratories around the world
Australian National gemological association of Australia.
Gemological Testing Center The AGTA is an association of US and Canadian colored gemstone and cultured pearl industry professionals dedicated to promoting the natural colored gemstone trade. The association pursues its aims through the combined use of educational programs, industry events, industry relations and publicity to the trade and consumer, while maintaining the highest ethical standards among its members and within the industry.
US Lab Well-known US gemological Lab and school
Another US Labdiamond lab and jewelers' association
AGTAThe Gemological Testing Center
North America's foremost gem-testing laboratory devoted to colored gemstones and pearls.A member lab of the Laboratory Manual Harmonization Committee (LMHC).
Canadian Canadian Institute of Gemmology.
Another Canadian Lab Canada's national gemology association
Italian lab Italy's well-known gemological Lab
Germany's oldest gemological institute and Lab
British lab. of the world's oldest gemological organizations and labs
Japanese Well-known Japanese gemological Lab
Swiss Well-known Swiss gem laboratory
Another Swiss lab Well-known Swiss gem lab
Antwerp Diamond High Council, Antwerp, Belgium
Gemstone Dealers Assoc.Largest international colored gemstone dealers' association
IGE - Spanish Instituto Gemológico Español - Spanish gemological institute
French Paris gem Lab
Another French Lab France-based gemological institute
Portuguese Lab Portuguese gem laboratory
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