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Hydroboracite & Gypsum

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WND582125

Hydroboracite & Gypsum

Description Tabs

Description
Locality: 
Kohnstein Quarry, Niedersachswerfen, Nordhausen District, Thuringia, Germany
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 2.6 × 1.4 cm
Largest Crystal: 
2.60cm
Description

An exceptional mini is showing some excellent waterclear crystals of hydroboracite, perched on a single, colourless gypsum. The hydroboracite is very good terminated, sharp edged and high lustrous. By the way, hydroboracite from Niedersachswerfen is the best quality in the world.

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...

Gypsum

Formula: 
CaSO4·2H2O
Strunz: 
7.CD.40
Hardness: 
2.0
Streak: 
White.
Wendel Minerals

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