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Siderite & Sphalerite

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SCH33188

Siderite & Sphalerite

Description Tabs

Description
Locality: 
Aggeneys, Namakwa District, Northern Cape Province, South Africa
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.5 × 3.4 × 4.9 cm
Description

Neat brownish mixture of siderite and sphalerite are replacing a large sharply formed calcite crystal. The calcite is doubly terminated and there is no damage.

The specimen is very light and It is not be surprise to find that the interior of the calcite crystal is hollow.

A very choice pseudomorph specimen. Shows nicely all around. 

Mineral Data
What's on the rock

Siderite

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

Sphalerite

Formula: 
ZnS
Strunz: 
2.CB.05a
Crystal System: 
Isometric
Hardness: 
3.5 - 4.0
schani

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