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Cobaltoan Calcite Psm Kutnohorite

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PDM624318

Cobaltoan Calcite Psm Kutnohorite

Description Tabs

Description
Locality: 
Pachapaqui District, Bolognesi Province, Ancash Department, Peru
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
12.8 × 7 × 5.5 cm
Largest Crystal: 
2.50cm
Description

Hollow crystals of manganoan calcite that form a crust after now dissolved, fan bundle-shaped kutnohorite crystals, on a matrix of lustrous crystallized pyrite.

Ex. Emile Requette,#184.

Mineral Data
What's on the rock

Cobaltoan Calcite

Variety Of: 

Calcite

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

Kutnohorite

Formula: 
Ca(Mn,Mg,Fe)(CO3)2
Strunz: 
5.AB.10
Hardness: 
3.5 - 4.0
Type Locality: 
Poličany, Kutná Hora (Kuttenberg), Central Bohemia Region, Bohemia (Böhmen; Boehmen), Czech Republic

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