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Spinel & Humite

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SER869921

Spinel & Humite

Description Tabs

Description
Locality: 
San Vito Quarry, Ercolano, Monte Somma, Somma-Vesuvius, Naples, Campania, Italy
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
2.6 × 1.8 × 1.5 cm
Description

some large spinel crystals on yellow humite

Mineral Data
What's on the rock

Spinel

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

Humite

Formula: 
(Mg,Fe2+)7(SiO4)3(F,OH)2
Strunz: 
9.AF.50
Crystal System: 
Orthorhombic
Hardness: 
6.0
Type Locality: 
Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy