GB/T 30712-2014
Provision of permissible errors for measurement of polished diamond mass (English Version)
- Standard No.
- GB/T 30712-2014
- Language
- Chinese, Available in English version
- Release Date
- 2014
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Latest
- GB/T 30712-2014
- Scope
- This standard specifies the requirements, test methods and notations for the quality measurement tolerances of polished diamonds. This standard applies to the trade and quality supervision of polished diamonds settled by quality. This standard applies to single polished diamonds with a mass greater than or equal to 0.0400g (0.20 ct); single polished diamonds with a mass less than 0.0400g (0.20 ct) and group-set polished diamonds that are settled in batches can be implemented with reference to this standard.
GB/T 30712-2014 Referenced Document
- GB 11887 Jewellery.Fineness of precious metal alloys and designation
- GB/T 16554 Diamond grading*， 2017-10-14 Update
GB/T 30712-2014 history
- 2014 GB/T 30712-2014 Provision of permissible errors for measurement of polished diamond mass
