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Stilpnomelane & Pyrrhotite

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SMM718292

Stilpnomelane & Pyrrhotite

Description Tabs

Description
Locality: 
Canaglia Mine, Porto Torres, Sassari Province, Sardinia, Italy
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 3 × 1.5 cm
Description

Black stilpnomelane crystals and hexagonal metallic pyrrhotite.

Boxed with Label
Mineral Data
What's on the rock

Stilpnomelane

Formula: 
(K,Ca,Na)(Fe2+,Mg,Al,Fe3+)8(Si,Al)12(O,OH)36·nH2O
Strunz: 
9.EG.40
Hardness: 
3.0 - 4.0
Type Locality: 
Melchior and Tobias adits, Horní Údolí (Obergrund), Zlaté Hory (Zuckmantel), Olomouc Region, Moravia (Mähren; Maehren), Czech Republic

Pyrrhotite

Formula: 
Fe1-xS (x = 0 to 0.17)
Strunz: 
2.CC.10
Crystal System: 
Monoclinic
Hardness: 
3.5 - 4.0

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