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Chalcedony & Calcite On Siderite

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RHT637359

Chalcedony & Calcite On Siderite

ex collection Otfried Kopp
Classic Locality

Description Tabs

Description
Locality: 
Hüttenberger Erzberg, Hüttenberg, Sankt Veit an der Glan District, Carinthia, Austria
Class: 
Combination
Size Range: 
Cabinet (10-18 cm)
Size: 
12.3 × 10.4 × 3 cm
Weight: 
725.00gr
Description

Pretty good specimen of brown siderite crystals encrusted with colorless chalcedony with some calite/aragonite crystals on top. The back is encrusted with calcite/aragonite.

A few dings only, laying open the siderite underneath the chalcedony.

Mineral Data
What's on the rock

Chalcedony

Variety Of: 

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Hardness: 
7.0
Hardness: 
6.5 - 7.0
Streak: 
White
Type Locality: 
Kadıköy (Chalcedon), Istanbul Province, Marmara Region, Turkey

Calcite

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

Siderite

Formula: 
FeCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.5
Streak: 
White
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