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Tennantite & Manganoan Calcite

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AST1038588

Description Tabs

Description
Locality: 
Madem-Lakko Mine, Cassandra Mines, Aristotelis, Chalkidiki, Central Macedonia, Greece
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.8 × 3.8 × 2.3 cm
Description

Spherical aggregate of intergrown disc shaped manganoan calcite crystals on tennantite crystals matrix, few tennantite crystals can be seen at the edge of the specimen. Old times classic specimen from Madem Lakkos mine.

Mineral Data
What's on the rock

Tennantite

Formula: 
Cu6[Cu4(Fe,Zn)2]As4S13
Strunz: 
2.GB.05
Crystal System: 
Isometric
Hardness: 
3.0 - 4.5
Type Locality: 
Cornwall, England, UK

Manganoan Calcite

Variety Of: 

Calcite

Formula: 
CaCO3
Strunz: 
5.AB.05
Hardness: 
3.0
Formula: 
(Ca,Mn)CO3
Hardness: 
0.0

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