GB/T 18303-2008
Color grading of polished diamond by visual matching (English Version)
- Standard No.
- GB/T 18303-2008
- Language
- Chinese, Available in English version
- Release Date
- 2008
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB/T 18303-2008
- Replace
- GB/T 18303-2001
- Scope
- This standard specifies the basic conditions, operating procedures and arbitration for the evaluation of diamond (cut) color (Cape series) by visual evaluation method. This standard applies to the visual evaluation of the color grade of diamonds that have been processed and polished. Mounted diamonds can be implemented with reference to this standard.
GB/T 18303-2008 Referenced Document
- GB/T 15483.1 Proficiency testing by interlaboratory comparisons--Part 1: Development and operation of proficiency testing schemes
- GB/T 16554-2003 Diamond--Grading
GB/T 18303-2008 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
