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Anorthite Spinel & Augite

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POL862921

Anorthite Spinel & Augite

Classic Locality

Description Tabs

Description
Locality: 
San Vito Quarry, Ercolano, Monte Somma, Somma-Vesuvius, Naples, Campania, Italy
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.1 × 3.8 × 4.1 cm
Description

Very nice and rich specimen of colorless to white Anorthite cristals with well formed, balck and lustrous Spinel crystals var. Pleonaste with green, lustrous crystals of Augite var. Fassaite on matrix from classic locality.

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

Spinel

Formula: 
MgAl2O4
Strunz: 
4.BB.05
Crystal System: 
Isometric
Hardness: 
7.5 - 8.0

Augite

Formula: 
(Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
Strunz: 
9.DA.15
Crystal System: 
Monoclinic
Hardness: 
5.5 - 6.0

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