Moving mountains for you
Switch currency

Current Live Auctions

Current Live Fixed Price Sales

Scorodite With Chalcophyllite & Pharmacosiderite

Views:
Watches:
JYJ108536

Scorodite With Chalcophyllite & Pharmacosiderite

Description Tabs

Description
Locality: 
Wheal Gorland, St Day, Cornwall, United Kingdom
Size Range: 
Thumbnail (1-3cm)
Size: 
1.6 × 1.5 × 1.5 cm
Description

This nice specimen shows aggregates of light blue to lavender coloured scorodite, partly overgrown by sharp, waterblue crystals chalcophyllite. These minerals are in paragenesis with lustrous crystals of olive green pharmacosiderite.

Mineral Data
What's on the rock

Scorodite

Formula: 
Fe3+AsO4·2H2O
Strunz: 
8.CD.10
Crystal System: 
Orthorhombic
Hardness: 
3.5 - 4.0
Type Locality: 
Stamm Asser Mine, Graul, Langenberg, Schwarzenberg District, Erzgebirge, Saxony, Germany

Chalcophyllite

Formula: 
Cu18Al2(SO4)3(AsO4)3(OH)27·33H2O
Strunz: 
8.DF.30
Crystal System: 
Trigonal
Hardness: 
2.0

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