Regulamentações Estados Unidos da América FTC Guidelines FTC Disclosure Guidelines for Synthetic Gems and Treated Gems FTC Weight Guidelines NRC Fact Sheet on Irradiated Gemstones FTC Jewelry Guidelines International Organization for Standardization Jewelers Vigilance Committee FTC Guides for the Jewelry, Precious Metals, and Pewter Industries Platinum Guild World Gold Council Palladium Alliance International The Silver Institute FrançaCIBJO – Do’s and Don’ts guide