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The gems are second only to colored diamonds in value, but their troubled provenance has made them an anathema to many.

United statesFrance generalVan cleef arpelsVincent pardieuStefanos karampelasCartier phaanLaurent decqueSuu kyiJewellery councilGemstones working groupMuzo companiesUs treasury departmentFrench gemmological laboratoryElizabeth taylorVan cleefJacqueline karachi langane