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Snowflake Obsidian & Cristobalite

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RHT698599

Snowflake Obsidian & Cristobalite

Classic Locality

Description Tabs

Description
Locality: 
Black Spring, Black Rock Desert, Millard County, Utah, United States of America
Class: 
Massive/Crystalline
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 3.9 × 2.5 cm
Weight: 
43.00gr
Description

A piece of natural volcanic glass - so-called snow flake obsidian. The white inclusions are crystal patterns of the mineral cristobalite, result of partial crystallisation of the glass.

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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