The National Association of Jewellers
Natural Diamond Council
World Gold Council
Platinum Guild International
National Association of Jewelry Appraisers
CIBJO World Jewellery Confederation
Responsible Jewellery Council
The International Colored Gemstone Association
Jewelers Vigilance Committee
American Gem Trade Association
Rapaport USA Inc.
National Pawnbrokers Association
Jeweler’s Resource Bureau
The Jewelers Board of Trade
American Gem Society