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| Chinese National Standard Category: Special non-metal ore |
| English Title: | Colour grading of polished diamond by visual matching |
| Chinese Title: | 钻石色级比色目视评价方法 |
| Standard No.: | GB/T 18303-2001 |
| Category No.: | D58 |
| Issued by: | CSBTS |
| Issued on: | 2001-01-21 |
| Implemented on: | 2001-5-1 |
| Status: | superseded |
| Superseded by: | GB/T 18303-2008 Color grading of polished diamond by visual matching |
| Superseded on: | 2008-11-1 |
| Abolished on: | 2008-11-01 |
| Superseding: | GB/T 18303-2000 Colour grading of polished diamond by visual matching |
| Word Count: | 1500 words |
| Similar Standards: | GB/T 18303-2008 GB/T 18303-2001 GB/T 16554-1996 |
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