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Stilbite

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Stilbite

Ex Peter Uerpmann Collection

Description Tabs

Description
Locality: 
Hvaleyri, Hvalfjordur, Iceland
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.2 × 3.4 × 2 cm
Description

Due to current collecting restrictions mineral specimens from Iceland are scarce and tend to be older material. This is a lovely little stilbite group of sheaves with exellent lustre. Hard to obtain.

Condition
General: 
Excellent - Some minor edge wear
Mineral Data
What's on the rock

Stilbite

Synonym Of: 

Stilbite-Ca

Formula: 
NaCa4[Al9Si27O72]·nH2O
Strunz: 
9.GE.10
Hardness: 
3.5 - 4.0

Stilbite-Na

Formula: 
(Na,Ca,K)6-7[Al8Si28O72]·nH2O
Strunz: 
9.GE.10
Hardness: 
3.5 - 4.0
Hardness: 
3.5 - 4
Colour: 
White
Streak: 
White
Provenance

Peter Uerpmann Collection

Fri, 2016-09-30 19:31 -- admin
Some History
Dates: 
1970s- 
2002
Type: 
Collector/Collection
Specialisms: 
Aesthetics, Germany, Tsumeb
About

Peter Uerpmann originally studied mining at Clausthal University of Technology and then followed a career in the German/European Nuclear...

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