1 Scope This Standard specifies fineness range 1) of noble metals in jewellery, mark for jewellery, test method and designation method for precious metal jewellery. This Standard is applicable to jewelleries produced and distributed in jewellery industry and at home (China). 2 Normative References Provisions of the following documents, through reference in this Standard, constitute provisions of this Standard. For dated reference, subsequent amendments (excluding correction contents) to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document is applicable to these specifications. GB/T 9288 Gold Jewellery Alloys - Determination of Gold - Cupellation Method (Fire Assay) (GB/T 9288-2006, ISO 11426: 1997, MOD) GB/T 16552 Gems - Nomenclature GB/T 16553 Gems - Testing GB/T 16554 Diamond Grading GB/T 18781 Cultured Pearl Grading GB/T 17832 Silver Jewellery Alloys - Determination of Silver - Volumedtric (Potentionmetric) Method Using Potassium Bromide (GB/T 17832-2008, ISO 11427: 1993, MOD) GB/T 19719 Jewellery - Determination of the Release of Nickel - Method of Spectrometry (GB/T 19719-2005, EN 1811: 1998, MOD) GB/T 19720 Platinum Jewellery Alloys - Determination of Platinum and Palladium - Gravimetric Method after Precipitation of Diammonium Hexachloroplatinate and Dimethylglyoxime (GB/T 19720-2005, ISO 11210: 1995, MOD) GB/T 21198.6 Determination of Precious Metals in Precious Metals Jewellery Alloys - Method Using ICP Spectrometry - Part 6: Difference Method QB/T 1689 Terms of Precious Metal Adornment SN/T 2004.3-2005 Determination of Chromium (VI) in Electrical and Electronic Equipment - Part 3: Diphenylcarbohydrazide Spectrophotometric Method 3 Term and Definition For the purposes of this Standard, the following terms and definitions apply. 3.1 Fineness The minimum mass content of precious metal, measured in terms of parts per thousand by weight of precious metal alloy 3.2 Marking Marks printed on precious metal jewellery
