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Cubanite & Chalcopyrite

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WND813505

Cubanite & Chalcopyrite

Classic Locality

Description Tabs

Description
Locality: 
Morro Velho Mine, Nova Lima, Minas Gerais, Brazil
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 6.6 × 3.2 cm
Description

This fine combination piece features 4 species in fine and contrastful association. There is discoidal, amber yellow siderite accompanied by sharp and colourless rockcrystals and the two sulfides cubanite and chalcopyrite. Both of the sulfides are difficult to distinguish. The cubanite is more star-shaped and on this specimen are just a bunch of this species. Most of the sharp and well developed, tombac-golden crystals and clusters are chalcopyrite. But in any case this is a great and showy specimen in splendid condtion. 

Mineral Data
What's on the rock

Cubanite

Formula: 
CuFe2S3
Strunz: 
2.CB.55a
Crystal System: 
Orthorhombic
Hardness: 
3.5
Type Locality: 
Barracanao (Baracoa), Moa-Baracoa District, Mayarí-Baracoa Belt, Holguín Province, Cuba

Chalcopyrite

Formula: 
CuFeS2
Strunz: 
2.CB.10a
Crystal System: 
Tetragonal
Hardness: 
3.5 - 4.0
Wendel Minerals

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