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Cuspidine & Biotite

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SER1134956

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Description
Locality: 
San Vito Quarry, Ercolano, Monte Somma, Somma-Vesuvius, Naples, Campania, Italy
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.7 × 2.1 × 3.2 cm
Description

white pointed cuspidine crystals on a bed of hexagonal biotite crystals

Mineral Data
What's on the rock

Cuspidine

Formula: 
Ca4(Si2O7)(F,OH)2
Strunz: 
9.BE.17
Hardness: 
5.0 - 6.0
Streak: 
White
Type Locality: 
Monte Somma, Somma-Vesuvius Complex, Naples Province, Campania, Italy

Biotite

Group Parent: 
Mica Group

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15
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Start 17 Feb 18:00
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