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Betekhtinite Chalcocite & Baryte

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SCH107149

Betekhtinite Chalcocite & Baryte

Description Tabs

Description
Locality: 
Dzhezkazgan, Karaganda Oblast, Kazakhstan
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.9 × 4.3 × 6.2 cm
Description

Flattened pseudo-hexagonal black crystals of sharply formed chalcocite set on quartz and associated with light orange baryte crystals. Several sharp, lustrous, metallic-grey color, prismatic betekhtinite crystals in parallel growth are scattered over the barite with quartz.

 

Mineral Data
What's on the rock

Betekhtinite

Formula: 
(Cu,Fe)21Pb2S15
Strunz: 
2.BE.05
Crystal System: 
Orthorhombic
Hardness: 
3.0 - 3.5
Colour: 
Black
Streak: 
Black
Type Locality: 
Ernst Thälmann Shaft (Vitzthum Shaft), Hübitz, Siersleben, Mansfeld Basin, Saxony-Anhalt, Germany

Chalcocite

Formula: 
Cu2S
Strunz: 
2.BA.05
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.0

Baryte

Formula: 
BaSO4
Strunz: 
7.AD.35
Hardness: 
3.0 - 3.5
Streak: 
White
schani

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