GB/T 16554-2003
AbolishedDiamond grading
钻石分级
Application Summary AI generated
GB/T 16554-2003 specifies the grading rules for unmounted natural diamonds, including criteria for color, clarity, cut, and carat weight. It is primarily applied in the Chinese jewelry industry for quality assessment, certification, and trading of diamonds in retail, appraisal, and laboratory testing contexts.
Related Standards
GB/T 21198.4-2007
Determination of precious metals in precious metals jewellery alloys - Method using ICP spectrometry - Part 4: 999‰ precious metals jewellery alloys - Determination of precious metals - Difference method
GB/T 21198.3-2007
Determination of precious metals in precious metals jewellery alloys - Method using ICP spectrometry - Part 3: Palladium jewellery alloys - Determination of palladium - Method using a solution with yttrium as internal standard element
GB/T 21198.6-2007
Determination of precious metals in precious metals jewellery alloys - Method using ICP spectrometry - Part 6: Difference method
GB/T 21198.5-2007
Determination of precious metals in precious metals jewellery alloys using ICP spectrometry - Part 5: 999‰ silver jewellery alloys - Determination of silver - Difference method
GB/T 18303-2008
Color grading of polished diamond by visual matching
GB/T 19719-2005
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GB/T 19720-2005
Platinum jewellery alloys-Determination of platinum and palladium-Gravimetric method after precipitation of diammonium hexachloroplatinate and dimethylglyoxime
GB/T 19718-2005
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