Cobalt spinel from Tanzania 3mm/0.133ct loose Japanese and German

This beautiful blue. This hard shine has a Mohs hardness of 8. "Blue spinel" does not necessarily mean "cobalt spinel"; anything with a confirmed cobalt band is called "cobalt spinel". It is a cobalt spinel that recognizes the cobalt band. Includes sorting by the Japanese and German Gem Research Institute. Round 3mm.

・Type: Loose (natural stone)
・Stone name: Cobalt spinel
・Weight: 3mm/0.133ct
・Scratch/chip: S
・Inclusion: S
·remarks:---
・Accessories: Sorting (Japan-German Gem Research Institute), Karatz quality guarantee, case

▷For more information about spinel
Spinel characteristics, types, fakes, value standards, etc.


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karatz_item_id: 11539886