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Cristobalite

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PDM849538

Cristobalite

Description Tabs

Description
Locality: 
Inyo County, California, United States of America
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.6 × 1.4 × 0.6 cm
Description

Spheroidal nodule of white feldspar, cut in half with the cavities richly spotted by tens of white cristobalite spheres.

This were found in a obsidian matrix and I’m told that the locality is since long in a military property, and the last pieces were recovered in the 1970’s.

Acquired in 1977. Former Jan Sibtsen collection, #2800.

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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