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Quartz Psm Anhydrite & Amethyst

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ESM765864

Quartz Psm Anhydrite & Amethyst

Description Tabs

Description
Locality: 
Iraí, Rio Grande do Sul, Brazil
Class: 
Combination
Size Range: 
Museum (18cm plus)
Size: 
18 × 12 × 6 cm
Description

Quartz crystals psm after anhydrite with rosettes of amethyst crystals

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

Amethyst

Variety Of: 

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Hardness: 
7.0
Formula: 
SiO2
Hardness: 
0.0
Colour: 
Purple