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Prehnite

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CLB151681

Prehnite

Description Tabs

Description
Locality: 
Fischbach, Idar-Oberstein, Birkenfeld, Rhineland-Palatinate, Germany
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 4.8 × 3.2 cm
Description

Prehnite nodule with remnants from the melaphyr matrix from the legendary prehnite occurence in the Fischbach valley near Idar-Oberstein. Very rare.
One side cut and polished.
Backside pictured.

Mineral Data
What's on the rock

Prehnite

Formula: 
Ca2Al2Si3O10(OH)2
Strunz: 
9.DP.20
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Karoo dolerites, Cradock, Chris Hani District, Eastern Cape Province, South Africa

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