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Vonsenite & Tridymite

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CLB77726

Vonsenite & Tridymite

Description Tabs

Description
Locality: 
La Fossa Crater, Vulcano Island, Messina Province, Sicily, Italy
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 3.2 × 2.2 cm
Description

Good sample of the rare hair-thin vonsenite crystals with tridymite from Vulcano Island.

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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