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Analcime Psm Calcite

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LGM133967

Analcime Psm Calcite

Ex Dr. Krantz, Bonn, Germany, Ex Dr. Garbari, Trento, Italy
With Antique Label

Description Tabs

Description
Locality: 
Le Masonade, San Nicolò Valley, Buffaure Group, Trento Province, Trentino-Alto Adige, Italy
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 6 × 5 cm
Largest Crystal: 
1.00cm
Description

This specimen features both analcime in original trapezohedron form and as rhombohedrons of altered calcite. Light pinkish color caused by iron oxyde coating. Comes with an old Label of the italian enterpriser and collector Guiseppe Garbari (1863-1937, Trento, Italy). A very good example of this uncommon preudomorph from a classic locality, probably from the time around 1890-1900. Weight: 135 grams

Mineral Data
What's on the rock

Analcime

Formula: 
Na2(Al2Si4O12)·2H2O
Strunz: 
9.GB.05
Crystal System: 
Triclinic
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Cyclopean Islands, Acitrezza (Aci Trezza), Etna Volcanic Complex, Catania Province, Sicily, Italy

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

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