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Cassiterite With Pyrrhotite & Quartz

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CLB149927

Cassiterite With Pyrrhotite & Quartz

ex collection Prof. Wotruba
Classic Locality

Description Tabs

Description
Locality: 
Viloco Mine, Loayza Province, La Paz Department, Bolivia
Size Range: 
Cabinet (10-18 cm)
Size: 
12.5 × 8.3 × 6 cm
Description

Uncommon mineral combo, rarely seen from this locality or anywhere else: dark brown, lustrous, partly translucent cassiterite crystals up to 1.2 cm and shiny, golden pyrrhotite crystal aggegates up to 1.9 cm (a lot better than pictured) with some quartz crystals. May be trimmed and eventually split into two or three specimen.

Mineral Data
What's on the rock

Cassiterite

Formula: 
SnO2
Strunz: 
4.DB.05
Crystal System: 
Tetragonal
Hardness: 
6.0 - 7.0

Pyrrhotite

Formula: 
Fe1-xS (x = 0 to 0.17)
Strunz: 
2.CC.10
Crystal System: 
Monoclinic
Hardness: 
3.5 - 4.0

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

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