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Amethyst Calcite & Goethite

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ESM735480

Amethyst Calcite & Goethite

Description Tabs

Description
Locality: 
Tichka Massif, Asni Cercle, Al Haouz Province, Marrakesh-Safi Region, Morocco
Class: 
Combination
Size Range: 
Cabinet (10-18 cm)
Size: 
11 × 8 × 8 cm
Description

A complete geode lined with amethyst crystals hosting black goethite needles and scalenohedral calcite crystals on clusters of stacked dark calcite crystals

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