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Colemanite

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QRI957527

Colemanite

Former collection Christian Mavris
Gem Crystal

Description Tabs

Description
Locality: 
Bigadiç Mine, Bigadiç District, Balikesir Province, Turkey
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.7 × 4.3 × 4 cm
Largest Crystal: 
1.50cm
Weight: 
116.00gr
Description

A miniature drusy of colemanite crystals of excellent lustre and good white color, locally transparent. Main crystal is a remarkable 1.5 cm individual, proudly stangind above the others.

With some peripleral bruising, this is good specimen from the classic locality. From my personal collection since the early 2000s. Nowadays pretty scarce on the market, as colemanite is usually ground as commodity and specimens are rarely recovered. 

Mineral Data
What's on the rock

Colemanite

Formula: 
Ca[B3O4(OH)3]·H2O
Strunz: 
6.CB.10
Hardness: 
4.5
Type Locality: 
Furnace Creek District (Furnace Creek Borate District; Death Valley Area Borate Deposits; Ryan area), Inyo Co., California, USA

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