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Pyrite Psm Pyrrhotite

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CLB131791

Pyrite Psm Pyrrhotite

Pseudomorph

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Description
Locality: 
Neudorf, Harz, Saxony - Anhalt, Germany
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 3.4 × 1.7 cm
Description

Tumbled piece of a pseudomorph of pyrite after pyrrhotite, only found in Neudorf, but the locality is long defunct.
So called'feather pyrite'.

Mineral Data
What's on the rock

Pyrite

Formula: 
FeS2
Strunz: 
2.EB.05a
Crystal System: 
Isometric
Hardness: 
6.0 - 6.5

Pyrrhotite

Formula: 
Fe1-xS (x = 0 to 0.17)
Strunz: 
2.CC.10
Crystal System: 
Monoclinic
Hardness: 
3.5 - 4.0

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