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Amethyst Calcite & Goethite

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KAT689635

Amethyst Calcite & Goethite

Classic Locality

Description Tabs

Description
Locality: 
Rio Grande do Sul, Brazil
Class: 
Combination
Size Range: 
Museum (18cm plus)
Size: 
13.4 × 19 × 6 cm
Description

a very fine combination of purple amethyst, phantom calcite and goethite

an matrix

Mineral Data
What's on the rock

Amethyst

Variety Of: 

Quartz

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

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

Goethite

Formula: 
α-Fe3+O(OH)
Strunz: 
4.00.
Crystal System: 
Orthorhombic
Hardness: 
5.0 - 5.5
Type Locality: 
Hollertszug Mine (Hollerter Zug Mine), Dermbach, Herdorf, Siegerland, Rhineland-Palatinate, Germany

Seller Information

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