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Arsenopyrite Twin & Manganoan Calcite

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PDM989214

Arsenopyrite Twin & Manganoan Calcite

Description Tabs

Description
Locality: 
Julcani Mine, Julcani, Angaraes Province, Huancavelica Department, Peru
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.7 × 5.6 × 3.7 cm
Weight: 
170.00gr
Description

Spiky aggregate of steel grey arsenopyrite crystals of good metallic lustre, on a matrix of pyrite and crystallized manganoan calcite that is pink fluorescent under long UV light. The arsenopyrite crystals form numerous six points, star-shaped clusters, clearly twinned on {201}.

Acquired in 2005. Ex Ludo Van Goethem.

Combine specimens to reduce shipping costs!.

Mineral Data
What's on the rock

Arsenopyrite

Formula: 
FeAsS
Strunz: 
2.EB.20
Crystal System: 
Monoclinic
Hardness: 
5.5 - 6.0

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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