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Perhamite Turquoise & Baryte

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ALB141383

Perhamite Turquoise & Baryte

Description Tabs

Description
Locality: 
Silver Coin Mine, Valmy, Humboldt County, Nevada, United States of America
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 3.1 × 3.5 cm
Description

Groups of tiny crystals of perhamite among the baryte crystals. Somwhere crystals of turquoise, some of them gemmy.

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

Turquoise

Formula: 
Cu(Al,Fe3+)6(PO4)4(OH)8·4H2O
Strunz: 
8.DD.15
Crystal System: 
Triclinic
Hardness: 
5.0 - 6.0

Baryte

Formula: 
BaSO4
Strunz: 
7.AD.35
Hardness: 
3.0 - 3.5
Streak: 
White

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