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Prehnite Psm Anhydrite

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RHT785809

Prehnite Psm Anhydrite

ex collection Thomas, Idar-Oberstein, ex Mineralien Museum ... Berin, Dr. Fr. Tamnau-Stiftung - M. Belowsky 1911
With Antique Label

Description Tabs

Description
Locality: 
Woodland Park, Passaic County, New Jersey, United States of America
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.2 × 3.2 × 2 cm
Weight: 
30.00gr
Description

A hollow epimorph cast of pale greenish prehnite after anhydrite. From the collection of the Thomas family in Idar-Oberstein (19twenties). With an antique label from the Mineralien Museum ... Berlin (? - not completely readable because of some mouse-bites. Surely the museum of the Technische Hochschule - Technical University), Dr. Fr. Tamnau-foundation. Friedrich Tamnau (1802‐‐1879) was a banker, mineralogist and sponsor, donating his collection to the Technical University Berlin and installing the Tamnau-Foundation to support foreign travel to collect and study minerals.

Specimen of high historical value.

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

Anhydrite

Formula: 
CaSO4
Strunz: 
7.AD.30
Crystal System: 
Orthorhombic
Hardness: 
3.0 - 3.5
Type Locality: 
Salt mine, Hall valley, Hall, Innsbruck, Inn valley, North Tyrol, Tyrol, Austria

Seller Information

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