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Colemanite

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PDM625258

Colemanite

Description Tabs

Description
Locality: 
Thompson Mine, Death Valley, Inyo County, California, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.9 × 4.2 × 2.3 cm
Description

Old-time specimen of golden-amber colemanite crystals with excellent lustre. The centre of the crystals is transparent and are well-implanted on matrix. Undamaged. Mounted on a methacrylate socle.

Bought in 1981 by Dr. Bob Janssens (specimen #573).

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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