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Pharmacosiderite

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BCK561390

Pharmacosiderite

Description Tabs

Description
Locality: 
Northumberland Mine, Nye County, Nevada, United States of America
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.7 × 1.4 cm
Description

You are bidding on a small sample with a smattering of tiny tetrahedrons of pharmacosiderite. This is one of the few worldwide localities that exhibit the tetrahedron form for the species. Rare and unusual material.

Mineral Data
What's on the rock

Pharmacosiderite

Formula: 
KFe3+4(AsO4)3(OH)4·6-7H2O
Strunz: 
8.DK.10
Hardness: 
2.5
Streak: 
white
Type Locality: 
Carharrack Mine, St Day United Mines (Poldice Mines), Gwennap, Camborne - Redruth - St Day District, Cornwall, England, UK

Seller Information

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