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Valentinite & Coquandite

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PAV994992

Valentinite & Coquandite

Classic Locality

Description Tabs

Description
Locality: 
Ribeiro da Serra, Medas, Gondomar, Porto District, Portugal
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
1.4 × 2.2 × 1.7 cm
Description

Beautiful valentinite sample!!!

Lots of perfect crystals growing on stibnite crystals.

Coquandite is also present as white crystals.

An absolute rarity from an old time Sb mine.

Collected: 
Boxed with Label
Mineral Data
What's on the rock

Valentinite

Formula: 
Sb2O3
Strunz: 
4.CB.55
Hardness: 
2.5 - 3.0
Streak: 
White
Type Locality: 
Les Chalanches Mine, Allemont, Isère, Rhône-Alpes, France

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