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Coquandite & Stibnite

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CFL731998

Coquandite & Stibnite

Type Locality

Description Tabs

Description
Locality: 
Pereta Mine, Scansano, Grosseto Province, Tuscany, Italy
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.4 × 0.5 × 0.2 cm
Description

Rare specimen of microscopic white coquandite crystals on stibnite from one of its two co-type localities.  Coquandite is currently reported from only 10 localities worldwide.

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

Stibnite

Formula: 
Sb2S3
Strunz: 
2.DB.05
Hardness: 
2.0
Streak: 
Lead grey

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