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Quartz With Bitumen Inclusions On Anhydrite

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CLB517851

Quartz With Bitumen Inclusions On Anhydrite

ex collection Dr. W. Beck
Classic Locality

Description Tabs

Description
Locality: 
Monte Rosso, Castelnovo ne' Monti, Reggio Emilia Province, Emilia-Romagna, Italy
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.8 × 5.3 × 4 cm
Largest Crystal: 
1.50cm
Description

Double-terminated crystal of bituminous quartz. The deep black coloration is caused by inclusions of bituminous (biogenic) material.

Previous labels supplied (not photographed)
Mineral Data
What's on the rock

Quartz

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

Anhydrite

Formula: 
CaSO4
Strunz: 
7.AD.30
Crystal System: 
Orthorhombic
Hardness: 
3.0 - 3.5
Type Locality: 
Salt mine, Hall valley, Hall, Innsbruck, Inn valley, North Tyrol, Tyrol, Austria

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