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Dolomite With Celestine & Sulphur

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LGM668567

Dolomite With Celestine & Sulphur

Ex Dr. Fuchs coll., Sechtem, Germany, ex Dr. Krantz, Bonn, Germany
Classic Locality

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Description Tabs

Description
Locality: 
Simplon Railway Tunnel, Brig, Valais, Switzerland
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
5.5 × 8 × 4.5 cm
Weight: 
215.00gr
Description

An interesting combination specimen consisting of cream-colored dolomite, crystallized all around, with the typical rounded, saddle-like crystals. Associated with minor yellow sulfur and some blueish celestite crystals.

Labeled "Simplon Stollen" (Simplon tunnel), it is surely from the construction period of the Simplon railway tunnel. The two one-way tubes were built in 1898–1905 und 1912–1921. Nearly 20 kms long, it was worlds longest tunnel until the end of the 1970s. From Dr. Fuchs collection, originally certainly from old Dr. Krantz stock, Bonn, Germany.

These old specimens from swiss Simplon tunnel are very rare and increasingly hard to get.

Mineral Data
What's on the rock

Dolomite

Formula: 
CaMg(CO3)2
Strunz: 
5.AB.10
Crystal System: 
Trigonal - Rhombohedral
Hardness: 
3.5 - 4.0
Streak: 
White

Celestine

Formula: 
SrSO4
Strunz: 
7.AD.35
Hardness: 
3.0 - 3.5
Streak: 
White
Type Locality: 
Bell's Mill, Bellwood, Blair Co., Pennsylvania, USA...

Sulphur

Formula: 
S8
Strunz: 
1.CC.05
Crystal System: 
Orthorhombic
Hardness: 
1.5 - 2.5

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