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American Gem Society
Date joined: November 2005Website: http://www.americangemsociety.orgLocation: United StatesGCAL: Gem Certification & Assurance Lab, Inc
Date joined: July 2010Website: http://www.GemFacts.comLocation: United StatesGem Lab Services
Date joined: October 2012Website: http://www.gemlab.beLocation: BelgiumGemological Institute of America, Inc (GIA)
Date joined: May 2009Website: http://www.gia.eduLocation: United StatesGemological Science International (GSI)
Date joined: May 2010Website: http://www.gemscience.netLocation: United StatesHRD Antwerp NV
Date joined: March 2010Website: http://www.hrdantwerp.com/Location: BelgiumInternational Gemmological Institute BVBA
Date joined: October 2016Location: BelgiumInternational Gemological Institute (IGI) Inc, North & South America
Date joined: August 2009Website: http://www.igi-usa.comLocation: United StatesInternational Gemological Institute (India) Private Limited
Date joined: December 2015Location: IndiaLaboratoire Français de Gemmologie
Date joined: July 2011Website: http://www.laboratoire-francais-gemmologie.fr/Location: FranceRapaport USA, Inc
Date joined: September 2016Website: http://www.diamonds.netLocation: United StatesSarine Technologies Ltd
Date joined: August 2018Website: http://www.sarine.comLocation: IsraelSEQUEL LOGISTICS PVT LTD
Date joined: May 2013Website: http://www.sequel.co.inLocation: IndiaSheffield Assay Office
Date joined: July 2018Website: http://www.assayoffice.co.ukLocation: Sheffield, United KingdomVeyret SAS
Date joined: June 2015Website: http://www.veyret.frLocation: France