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Vonsenite & Tridymite

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CLB109761

Vonsenite & Tridymite

Classic Locality

Description Tabs

Description
Locality: 
La Fossa Crater, Vulcano Island, Messina Province, Sicily, Italy
Size Range: 
Small cabinet (7-10 cm)
Size: 
9 × 8.1 × 3 cm
Description

A few little vonsenite needles, partly included in tridymite, scattered across the front and back of this specimen. Possibly more to find if you cleave the matrix.

Mineral Data
What's on the rock

Vonsenite

Formula: 
Fe2+2Fe3+(BO3)O2
Strunz: 
6.AB.30
Hardness: 
5.0
Type Locality: 
Old City Quarry (City Quarry), North Hill, Fairmont Park, Riverside, Riverside Co., California, USA

Tridymite

Formula: 
SiO2
Strunz: 
4.DA.10
Crystal System: 
Triclinic - Pedial
Hardness: 
6.5 - 7.0
Streak: 
White
Type Locality: 
Cerro San Cristóbal, Mun. de Pachuca, Hidalgo, Mexico

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