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Erazoite Olivenite Baryte & Preisingerite

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ASC693043

Erazoite Olivenite Baryte & Preisingerite

New Mineral type

Description Tabs

Description
Locality: 
Chilena Mine, Antofagasta Province, Antofagasta Region, Chile
Class: 
Massive/Crystalline
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 3 × 3 cm
Description

Erazoite (IMA 2014-061) is a new copper tin sulfide structurally related to covellite, it occurs as tiny black roundish crystal aggregates enclosed in baryte crystals. The specimen has been cut and those grains can be clearly seen and those embedded in baryte and uncut. The baryte crystals are covered by perfectly crystallised olivenite and earthy preisingerite. Preisingerite is also visible as phantoms in baryte.

Very rare material!

 

Mineral Data
What's on the rock

Erazoite

Formula: 
Cu4SnS6
Crystal System: 
Trigonal
Colour: 
Black
Type Locality: 
Chilena Mine, Guanaco, Antofagasta, Chile

Olivenite

Formula: 
Cu2(AsO4)(OH)
Strunz: 
8.BB.30
Crystal System: 
Orthorhombic
Hardness: 
3.0
Type Locality: 
Carharrack Mine, St Day United Mines (Poldice Mines), Gwennap, Camborne - Redruth - St Day District, Cornwall, England, UK

Baryte

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

Preisingerite

Formula: 
Bi3(AsO4)2O(OH)
Strunz: 
8.BO.10
Hardness: 
3.0 - 4.0
Type Locality: 
San Francisco de los Andes mine, Calingasta, Calingasta Department, San Juan, Argentina

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