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Siegenite

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PDM617986

Siegenite

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Description
Locality: 
Buick Mine, Bixby, Iron County, Missouri, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 2.7 × 2 cm
Largest Crystal: 
0.40cm
Description

Steel-grey, highly lustrous aerial siegenite crystals of octahedral morphology, showing a typical twinning according to the spinel law. They are partially covered by shinny chalcopyrite crystal on the matrix scattered by tiny transparent rhombohedrons of calcite.

From the collection of Georges Vanacker (vanackerite), it was acquired in 1985.

Mineral Data
What's on the rock

Siegenite

Formula: 
CoNi2S4
Strunz: 
2.DA.05
Hardness: 
4.5 - 5.5
Type Locality: 
Stahlberg Mine (Schwabengrube), Müsen, Siegerland, North Rhine-Westphalia, Germany

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