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Perhamite Wavellite & Chlorargyrite

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FNW59093

Perhamite Wavellite & Chlorargyrite

Description Tabs

Description
Locality: 
Silver Coin Mine, Valmy, Humboldt County, Nevada, United States of America
Size Range: 
Small cabinet (7-10 cm)
Size: 
6 × 7.7 × 4.3 cm
Description

Specimen covered by minute clear perhamite crystals, some wavellite spheres and prismatic chlorargyrite crystals.

Mineral Data
What's on the rock

Perhamite

Formula: 
Ca3Al7.7Si3P4O23.5(OH)14.1·8H2O
Strunz: 
8.DO.20
Hardness: 
5.0
Streak: 
white
Type Locality: 
Dunton Gem Quarry, Newry, Oxford Co., Maine, USA

Wavellite

Formula: 
Al3(PO4)2(OH,F)3·5H2O
Strunz: 
8.DC.50
Hardness: 
3.5 - 4.0
Streak: 
White.
Type Locality: 
High Down Quarry, Filleigh, North Devon, Devon, England, UK

Chlorargyrite

Formula: 
AgCl
Strunz: 
3.AA.15
Crystal System: 
Isometric
Hardness: 
1.5 - 2.5
Streak: 
White
Type Locality: 
Marienberg District, Erzgebirge, Saxony, Germany
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