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Grundmannite

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JYJ601037

Grundmannite

Description Tabs

Description
Locality: 
El Dragón Mine, Quijarro Province, Potosi Department, Bolivia
Class: 
Massive/Crystalline
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.6 × 3.6 × 0.9 cm
Description

A section with embedded krutaite ore with a sample (marked blue) containing the rare Cu-Bi-Se mineral grundmannite. Glued into epoxy resin polished to P2400 and diamond polish paste  with 0.5 µm grain size. Afterwards it was SEM-EDS analysed, see corresponding section. 

Mineral Data
What's on the rock

Grundmannite

Formula: 
CuBiSe2
Crystal System: 
Orthorhombic
Hardness: 
2 - 2½
Colour: 
Black
Streak: 
Black
Type Locality: 
El Dragón Mine, Potosí Department, Bolivia
Isostructural with: 
Emplectite
Analysis
Analysis Report - only: Grundmannite