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Natrolite

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CLB560194

Natrolite

ex collection Schwanz
Type Locality

Description Tabs

Description
Locality: 
Hohentwiel, Singen, Freiburg Region, Baden-Württemberg, Germany
Class: 
Massive/Crystalline
Size Range: 
Small cabinet (7-10 cm)
Size: 
9.5 × 5 × 4.3 cm
Description

A very good, partly cut and polished specimen of orange-brown, radiating natrolite aggregates (type locality!) and - in the uncut cavity in the middle - white natrolite crystal tips marking the outsides of the botryoidal radiating aggregates. This material has completely disappeared from the market a long time ago. This is my last and one of the best specimen from the Schwanz collection.

Mineral Data
What's on the rock

Natrolite

Formula: 
Na2Al2Si3O10·2H2O
Strunz: 
9.GA.05
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Hohentwiel, Singen, Hegau, Baden-Württemberg, Germany

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