GB/T 18303-2001
Colour grading of polished diamond by visual matching (English Version)
- Standard No.
- GB/T 18303-2001
- Language
- Chinese, Available in English version
- Release Date
- 2001
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Status
- 2008-11
- Replace By
- GB/T 18303-2008
- Latest
- GB/T 18303-2008
- Scope
- This standard specifies the basic requirements and operating procedures for grading diamond (cut) color (Cape series) by visual evaluation method. This standard applies to the identification of color grading of diamonds that have been processed and polished.
GB/T 18303-2001 history
- 2008 GB/T 18303-2008 Color grading of polished diamond by visual matching
- 2001 GB/T 18303-2001 Colour grading of polished diamond by visual matching
