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Fayalite & Cristobalite

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SHS607241

Fayalite & Cristobalite

Description Tabs

Description
Locality: 
Little Lake Deposits, Sugarloaf Mountain, Inyo County, California, United States of America
Class: 
Massive/Crystalline
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.7 × 4.8 × 2.5 cm
Description

Fayalite and cristobalite on obsidiane

Mineral Data
What's on the rock

Fayalite

Formula: 
Fe2+2SiO4
Strunz: 
9.AC.05
Crystal System: 
Orthorhombic
Hardness: 
7.0
Type Locality: 
Faial Island (Fayal Island), Azores District, Portugal

Cristobalite

Formula: 
SiO2
Strunz: 
4.DA.15
Crystal System: 
Tetragonal - Trapezohedral
Hardness: 
6.0 - 7.0
Streak: 
White
Type Locality: 
Cerro San Cristóbal, Mun. de Pachuca, Hidalgo, Mexico