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Pharmacosiderite Psm Cobaltite

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RMM28654

Pharmacosiderite Psm Cobaltite

Rare Mineral

Description Tabs

Description
Locality: 
Sudbury District, Ontario, Canada
Size Range: 
Thumbnail (1-3cm)
Size: 
1.5 × 1 × 1 cm
Largest Crystal: 
1.50cm
Description

An exceptionally fine example of pharmacosiderite Psm cobaltite.

Crystals this large and as well defined are rare.

This specimen would rank among the top 10 pseudomorphs that have been found at this locality -self collected.

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

Cobaltite

Formula: 
CoAsS
Strunz: 
2.EB.25
Crystal System: 
Orthorhombic - Pyramidal
Hardness: 
5.5

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