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Cosalite

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CR689481

Cosalite

Rare Mineral

Description Tabs

Description
Locality: 
Kara Oba, Karaganda Oblast, Kazakhstan
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.6 × 3.8 × 3 cm
Description

Cosalite is an uncommon lead, bismuth sulfosalt and this is a very fine and rare combination specimen from this well-known locale.

Nested, jackstraw sprays and crystal groups of metallic cosalite needles to 1.5 cm are aesthetically scattered on  matrix.

Uncommonly excellent and rare specimen material from the Armin Wendland Collection.

Mineral Data
What's on the rock

Cosalite

Formula: 
Pb2Bi2S5
Strunz: 
2.JB.10
Hardness: 
2.5 - 3.0
Colour: 
Grey
Streak: 
Black
Type Locality: 
Cosalá Mine, Cosalá, Mun. de Cosalá, Sinaloa, Mexico