RESOURCES
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Accredited Gemologists Association (AGA) 619.501.5444
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American Gem Society (AGS) 702.233.6120
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American Society of Appraisers (ASA) 703.478.2228
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European Gemological Laboratory (EGL) 212.730.7380
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Gem Certification and Assurance Lab (GCAL) 212.869.8985
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Gemological Institute of America (GIA) 212.221.5858; 800.421.7250
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International Gemological Institute (IGI) 212.753.7000
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International Society of Appraisers (ISA) 206.241.0359
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National Association of Jewelry Appraisers (NAJA) 718.896.1536
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