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Graeserite

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CHP958850

Graeserite

Classic Locality

Description Tabs

Description
Locality: 
Monte Arsiccio Mine, Sant'Anna di Stazzema, Stazzema, Lucca Province, Tuscany, Italy
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 4 × 3 cm
Description

specimen with a very good gray-black metallic crystals of graeserite on matrix.

c. 5781

Mineral Data
What's on the rock

Graeserite

Formula: 
(Fe3+ ,Ti)4Ti3AsO13(OH)
Strunz: 
4.JB.55
Crystal System: 
Monoclinic
Hardness: 
5.5
Colour: 
Black
Streak: 
Black
Type Locality: 
Gorb, Lercheltini area (Lärcheltini), Binn Valley, Wallis (Valais), Switzerland

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