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Pyrrhotite On Siderite & Dolomite

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CLB169606

Pyrrhotite On Siderite & Dolomite

Classic Locality

Description Tabs

Description
Locality: 
Morro Velho Mine, Nova Lima, Minas Gerais, Brazil
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 6 × 1.5 cm
Description

Beautiful specimen with little brassy pyrrhotite crystals on greenish brown, lustrous siderite and white dolomite crystals. A very aesthetic ands almost perfect specimen.

Mineral Data
What's on the rock

Pyrrhotite

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

Siderite

Formula: 
FeCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.5
Streak: 
White

Dolomite

Formula: 
CaMg(CO3)2
Strunz: 
5.AB.10
Crystal System: 
Trigonal - Rhombohedral
Hardness: 
3.5 - 4.0
Streak: 
White

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