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Dufrénite With Chalcosiderite

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LGM126470

Dufrénite With Chalcosiderite

ex Ring collection, Munich,Germany
Classic Locality

Description Tabs

Description
Locality: 
Gunheath Pit, St Austell, Cornwall, United Kingdom
Size Range: 
Thumbnail (1-3cm)
Size: 
1.4 × 2.9 × 0.3 cm
Description

Dufrénite is a secondary mineral occurring with limonite in gossan of veins and in iron ore deposits.
Here are tiny dark green balls of dufrénite associated with emerald-green chalcosiderite in botryoidal forms.

Mineral Data
What's on the rock

Dufrénite

Formula: 
Ca0.5Fe2+Fe3+5(PO4)4(OH)6·2H2O
Strunz: 
8.DK.15
Hardness: 
3.5 - 4.5
Streak: 
Green
Type Locality: 
Anglar, Haute-Vienne, Limousin, France

Chalcosiderite

Formula: 
Cu(Fe3+,Al)6(PO4)4(OH)8·4H2O
Strunz: 
8.DD.15
Crystal System: 
Triclinic
Hardness: 
4.5
Type Locality: 
Phoenix United Mine, Minions, Linkinhorne, Liskeard District, Cornwall, England, UK

Seller Information

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