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Analcime & Orthoclase

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RGR748614

Analcime & Orthoclase

Description Tabs

Description
Locality: 
Big Rock Quarry, Granite Mountain, Little Rock, Pulaski County, Arkansas, United States of America
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 4 × 4.5 cm
Description

Lustrous trapezohedral Analcime crystal to 8 mm on a flat Orthoclase crystal. Interesting and rare combination of Analcime with flat orthoclase crystals, good condition. Originally acquired from L. Wals collection.

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

Orthoclase

Formula: 
KAlSi3O8
Strunz: 
9.FA.30
Hardness: 
6.0
Streak: 
White