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Goethite Quartz & Calcite

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ESM723007

Goethite Quartz & Calcite

Description Tabs

Description
Locality: 
Sidi Rahal, El Kelaâ des Sraghna Province, Marrakesh-Safi Region, Morocco
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
3.5 × 9 × 7 cm
Description

A quartz geode with clusters of black goethite needles and cream colored calcite crystals

Mineral Data
What's on the rock

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

Quartz

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

Calcite

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