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Natrolite Psm Nepheline

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ZLT171651

Natrolite Psm Nepheline

Classic Locality

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Description
Locality: 
Michelsberg Quarry, Katzenbuckel, Eberbach, Karlsruhe Region, Baden-Württemberg, Germany
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2.2 × 3.2 × 1.1 cm
Largest Crystal: 
0.50cm
Description

Nephelinshonkinite sample with a prepared hexagonal short prismatic crystal (~0.5 mm) of the rock forming nepheline, which is altered to a mixture of natrolite and clay minerals. Some small biotite crystals are also present. Collected 1973.

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

Nepheline

Formula: 
(Na,K)AlSiO4
Strunz: 
9.FA.05
Hardness: 
5.5 - 6.0
Type Locality: 
Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy

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