General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest
GB/T 32863-2016
Scope
This standard specifies the rules for grading natural, unoptimized or heat-treated loose, faceted, ground and polished rubies. This standard applies to the grading of natural non-optimized or heat-treated polished rubies without facets, and polished rubies with facets can be implemented with reference to this document.