Cobalt spinel from Tanzania 0.103ct loose/2.7mm

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". Cobalt spinel containing iron and cobalt. The content of iron and cobalt has been tested using a UV-visible spectrophotometer. Cobalt spinel from Tanzania is a hot topic in Tucson in 2023. 2.7mm

・Type: Loose (natural stone)
・Stone name: Cobalt spinel
・Weight: 0.103ct
・Scratch/chip: S
・Inclusion: S
·remarks:---
・Accessories: Karatz quality guarantee card, case

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


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karatz_item_id: 12543654