CIBJO releases Gemmological Special Report, discusses determining criteria for gem variety names
With fewer than two weeks to go to the opening of the 2021 CIBJO Congress on November 1, 2021, the sixth of this year’s CIBJO Special Reports has been released. Prepared by CIBJO’s Gemmological Commission, headed by Hanco Zwaan, the report focuses on two issues, namely the establishment of criteria for defining gem variety names, and the creation of an international set of standards, practices and nomenclature for the mainly jade and jadeite gem materials referred to as Fei Cui.