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Goethite & Smoky Quartz

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AFM178470

Goethite & Smoky Quartz

Description Tabs

Description
Locality: 
Teller County, Colorado, United States of America
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.2 × 7.7 × 6 cm
Largest Crystal: 
2.30cm
Description

Large radiating, lustrous goethite blades have formed a very aesthetic grouping on smoky quartz. From Teller Co., Colorado, USA. The goethite from Colorado is the finest in the world and this specimen shows why! No significant damage.

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

Smoky Quartz

Variety Of: 

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Hardness: 
7.0
Formula: 
SiO2
Hardness: 
0.0
AmericanFineMinerals