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Millerite & Chalcopyrite

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CLB88059

Millerite & Chalcopyrite

Classic Locality

Description Tabs

Description
Locality: 
Halls Gap, Lincoln County, Kentucky, United States of America
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.4 × 5.7 × 3 cm
Largest Crystal: 
4.00cm
Description

Wonderful chalcedony vug with a lot of fine brassy shiny millerite 'hairs' up to approx. 4cm in length.

There are also two very good, golden chalcopyrite crystals. From one of the best millerite localities.

Very rare and sought after specimen. Locality is closed for collecting.

Mineral Data
What's on the rock

Millerite

Formula: 
NiS
Strunz: 
2.CC.20
Crystal System: 
Trigonal
Hardness: 
3.0 - 3.5
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Chalcopyrite

Formula: 
CuFeS2
Strunz: 
2.CB.10a
Crystal System: 
Tetragonal
Hardness: 
3.5 - 4.0

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