Minerals identify

Know how to recognize them

Tokyoite

Vanadate mineral

Tokyoite is a rare barium vanadate : Ba2(Mn3+,Fe3+)OH(VO4)2. It is the manganese analogue of the iron rich gamagarite and the barium analogue of the lead vanadate, brackebuschite

It occurs in low-grade metamorphosed sedimentary manganese ore deposits associated with hyalophane

It was first reported for an occurrence in the Shiromaru Mine, Okutama, Tama district, Tokyo Prefecture , Honshu Island and approved by the IMA It has been found in two mines in Italy

Identification

Color of mineral

Red
Black

Mohs scale ( mineral hardness )

4.5

The streak

Red
Brown

Luster ( interacts light )

Vitreous

Crystal ( diaphaneity )

Monoclinic