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Baryte Goethite & Calcite

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PFK21298

Baryte Goethite & Calcite

Description Tabs

Description
Locality: 
Thasos Island, East Macedonia and Thrace, Greece
Size Range: 
Miniature (4.5-7 cm)
Size: 
4 × 6.6 × 4.8 cm
Largest Crystal: 
2.20cm
Description

A very nice specimen from Thasos!

Transparent & transculent barite crystals on goethite matrix. At the back there are yellowish brown goethite crystals. There is also calcite and minor malachite.
The specimen is not damaged, while it's too hard to find an undamaged specimen from this locality.

Mineral Data
What's on the rock

Baryte

Formula: 
BaSO4
Strunz: 
7.AD.35
Hardness: 
3.0 - 3.5
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

Calcite

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