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Anorthite

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SYA836669

Anorthite

Miyake vulcano erruption in 1874
Classic Locality

Description Tabs

Description
Locality: 
Miyake Island, Miyake, Miyake Subprefecture, Tokyo Metropolis, Honshu Island, Japan
Class: 
Single Crystal
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.5 × 1.3 cm
Largest Crystal: 
2.00cm
Description

All around perfect and sharp anorthite crystal with a thin uniform coating of solidified lava.

Very good crystal from the  Miyake volcano erruption in July 1874.

Mineral Data
What's on the rock

Anorthite

Formula: 
CaAl2Si2O8
Strunz: 
9.FA.35
Crystal System: 
Triclinic
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy

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