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Coquandite

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GMN209812

Coquandite

New Discovery

Description Tabs

Description
Locality: 
Herja Mine, Chiuzbaia, Baia Mare, Maramureș County, Romania
Size Range: 
Small cabinet (7-10 cm)
Size: 
8 × 5 × 1.7 cm
Description

White, pale yellow balls of silky tabular crystals on stibnite surface. (and some crystal group are pseudomorph after stibnite)
The piece is originated from the 1960s and this is the only known coquandite from herja, so it's really extremely rare materia.
The coquandite in macroscopic size is also very rare.....

Mineral Data
What's on the rock

Coquandite

Formula: 
Sb6+xO8+x(SO4)(OH)x(H2O)1- x (x = 0.3)
Strunz: 
7.DE.35
Crystal System: 
Triclinic
Hardness: 
3.0 - 4.0
Type Locality: 
Lucky Knock Mine (Lawrence Mine), Whitestone Coulee, Tonasket, Okanogan Co., Washington, USA

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