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Cristobalite

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UVM642292

Cristobalite

Description Tabs

Description
Locality: 
Marble Mountain Deposit, Jasper, Rio Grande County, Colorado, United States of America
Class: 
Massive/Crystalline
Size Range: 
Thumbnail (1-3cm)
Size: 
2.7 × 2.7 × 2.4 cm
Description

An interesting sphereical cristobalite concretion from the Marble Mountains, about 20 miles east of Ajo, Arizona.   Unusual material, from the collection of Jim Thomas collection, former mine manager at the New Cornelia pit.

Mineral Data
What's on the rock

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

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