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Henmilite & Buryatite

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SKY690045

Henmilite & Buryatite

Type Locality

Description Tabs

Description
Locality: 
Fuka Mine, Bitchu-cho, Takahashi, Honshu Island, Japan
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.3 × 0.8 × 0.8 cm
Description

Blue sharp crystals of the extremely rare henmilite associated to very pale pink buryatite from the only known locality worldwide for henmilite.

Henmilite is a Ca-Cu borate and buryatite is a Ca sulphate-borate that has only been found in two localities worldwide.

Mineral Data
What's on the rock

Henmilite

Formula: 
Ca2Cu[B(OH)4]2(OH)4
Strunz: 
6.AC.30
Hardness: 
1.5 - 2.0
Type Locality: 
Fuka mine, Fuka, Bicchu-cho (Bitchu-cho), Takahashi City, Okayama Prefecture, Chugoku Region, Honshu Island, Japan

Buryatite

Formula: 
Ca3(Si,Fe,Al)(SO4)[B(OH)4]O(OH)5·12H2O
Strunz: 
7.DG.15
Hardness: 
0.0
Streak: 
white
Type Locality: 
Solongo B deposit, Vitim Plateau, Buriatia Republic (Buryatia), Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia

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