igneous
Snowflake Obsidian
Obsidian with Cristobalite inclusions
AI-generated identification · may be incorrectHardness of 5-5.5. Black color with white 'snowflake' patterns. Vitreous to dull luster. Amorphous (volcanic glass) with crystalline inclusions.
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Physical properties
Hardness of 5-5.5. Black color with white 'snowflake' patterns. Vitreous to dull luster. Amorphous (volcanic glass) with crystalline inclusions.
Formation & geological history
Forms from the rapid cooling of silica-rich lava, preventing large crystal formation. The 'snowflakes' are cristobalite crystals that formed over time through devitrification.
Uses & applications
Commonly used in jewelry, lapidary arts, and for ornamental purposes.
Geological facts
The white 'snowflakes' are actually radial clusters of cristobalite, a high-temperature polymorph of quartz.
Field identification & locations
Identified by its distinctive black background with white radial inclusions and glassy texture. Common in volcanic regions.
