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Chinese National Standard Category: Special non-metal ore

English Title: Color grading of polished diamond by visual matching
Chinese Title: 钻石色级目视评价方法
Standard No.: GB/T 18303-2008
Category No.: D58
Issued by: AQSIQ, SAC
Issued on: 2008-05-26
Implemented on: 2008-11-1
Status: valid
Superseded by:
Superseded on:
Abolished on:
Superseding:GB/T 18303-2001 Colour grading of polished diamond by visual matching
Word Count:2500 words
Similar Standards: GB/T 18303-2008   GB/T 18303-2001   GB/T 16554-1996  
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