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Prehnite On Orthoclase

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PDM722904

Prehnite On Orthoclase

Description Tabs

Description
Locality: 
El Berrocal Mine, Bustarviejo, Madrid, Spain
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.3 × 4.5 × 1.9 cm
Largest Crystal: 
0.50cm
Description

Aesthetic flattened orthoclase crystal richly covered all around by very fine, pastel-green, lustrous, translucent prehnite crystals. From the El Berrocal Mine (Bustarviejo, Madrid), a rare locality specimen that is quite uncommon, even in Spanish collections. Representative sample of the miarolitic cavities of this area in central Spain.

Self-collected in 1995.

Mineral Data
What's on the rock

Prehnite

Formula: 
Ca2Al2Si3O10(OH)2
Strunz: 
9.DP.20
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Karoo dolerites, Cradock, Chris Hani District, Eastern Cape Province, South Africa

Orthoclase

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

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