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Pharmacosiderite

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PDM707097

Pharmacosiderite

With Antique Label

Description Tabs

Description
Locality: 
Perda de Pibera Mine, Gonnosfanadiga, South Sardinia Province, Sardinia, Italy
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.3 × 3.6 × 2 cm
Description

Gemmy olive green cubic crystals of pharmacosiderite with very good vitreous lustre lining cavities. Very uncommon locality material. In one of the labels is clearly readable: Filone del Michelio, Riu Planu is Castangias, Gonnosfanadiga. It comes with three old labels.

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

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