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Cristobalite

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UVM660008

Cristobalite

Jim Thomas Collection
Classic Locality

Description Tabs

Description
Locality: 
Marble Mountain Deposit, Jasper, Rio Grande County, Colorado, United States of America
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.2 × 2.3 × 2 cm
Description

Two rather masculine appearing intergrown spheres of cristobalite from the Marble Mountains, near Ajo, Arizona.   From the collection of Jim Thomas, former mining engineer at the New Cornelia Mine who actively collected the region.

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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