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Pyrrhotite & Calcite

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MNT157033

Pyrrhotite & Calcite

Classic Locality

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Description
Locality: 
Morro Velho Mine, Nova Lima, Minas Gerais, Brazil
Size Range: 
Cabinet (10-18 cm)
Size: 
10 × 10.5 × 6.5 cm
Description

A classic specimen from Morro Velho exhibiting whiteish rhombohedral calcite crystals (other specimens of this whiteish appearance have been analyzed to be unusual coloured siderite, but i did not test it and the accompanying label states calcite) with numerous crystals of pyrrhotite scattered on. The pyrrhotite shows excellent hexagonal crystallization forming thin plates with bronze to reddish tarnished colour. I checked the specimen with a loupe and there maybe some cubanite too as it is well known in this paragenesis of the Morrho Velho mine. A 1970s specimen in good condition! 583 g.

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

Calcite

Polymorph of: 
Aragonite and Vaterite
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

Seller Information

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Terms & Conditions

Thank you for your interest in my offers! Payment is possible via Paypal, bank transfer or cash if you pick up the item(s) personally. Bank data will be provided after settling the auction/transaction(s) if needed.

In case you are not happy with a specimen, you may send it back within 4 weeks. After receipt, i will refund the price minus shipping costs. Please inform me before sending an item back. If you have any questions (or maybe complaints) please feel free to contact me.

Best regards Roger

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