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Pharmacosiderite

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PCZ692796

Pharmacosiderite

Description Tabs

Description
Locality: 
Cornwall, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.7 × 3 × 1.8 cm
Description

Rare reflective pharmicosiderite crystals on all sides of this matrix with a main lined cavity on one side. A very good example of the species from Cornwall. Very hard to obtain material in this quality. 

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
Peter Crozier Minerals