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Opal Orthoclase & Albite

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SER840199

Opal Orthoclase & Albite

Description Tabs

Description
Locality: 
Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy
Class: 
Massive/Crystalline
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.5 × 5.1 × 5.1 cm
Largest Crystal: 
4.00cm
Description

two large, baveno's law twinned orthoclase crystals covered by trasparent opal and with light blue albite crystals

Mineral Data
What's on the rock

Opal

Formula: 
SiO2·nH2O
Strunz: 
4.DA.10
Hardness: 
5.5 - 6.5
Streak: 
White

Orthoclase

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

Albite

Formula: 
NaAlSi3O8
Strunz: 
9.FA.35
Crystal System: 
Triclinic
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Finnbo (Finbo), Falun, Dalarna, Sweden