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Quartz Psm Anhydrite

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PDM703609

Quartz Psm Anhydrite

Pseudomorph

Description Tabs

Description
Locality: 
Iraí, Rio Grande do Sul, Brazil
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.6 × 6.5 × 3.2 cm
Description

Very aerial diverging crystal sprays of anhydrite that have been completely replaced by white quartz. These pseudomorphs are partially hollow and are developed on a crystallized quartz matrix. These rare seldom pseudomorphs has become very scarce.

Ex. Dr. Bob Janssens specimen, #595.

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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