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Hydroboracite

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CR717337

Hydroboracite

Rare Mineral

Description Tabs

Description
Locality: 
Kohnstein Quarry, Harztor, Nordhausen, Thuringia, Germany
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 4 × 3 cm
Description

Colorless and gemmy prismatic crystals of hydroboracite up to 1.2 cm very rich on anhydrite.
Very good and beautiful specimen of this rare species.

Mineral Data
What's on the rock

Hydroboracite

Formula: 
CaMg[B3O4(OH)3]2·3H2O
Strunz: 
6.CB.15
Hardness: 
2.0
Type Locality: 
Inder B deposit and salt dome, Atyrau (Gur'yev), Atyrau Province (Atyrau Oblysy; Atyrau Oblast'), Kazakhstan...