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| Chinese National Standard List: Special non-metal ore |
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GB/T 18303-2008 Color grading of polished diamond by visual matching
Issued on: 2008-05-26 Price(USD): 104.0 |
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GB/T 18303-2001 Colour grading of polished diamond by visual matching
Issued on: 2001-01-21 Price(USD): 184.0 |
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GB/T 16554-1996 Diamond Grading
Issued on: 1996-10-07 Price(USD): 210.0 |
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