igneous
Snowflake Obsidian
Volcanic Glass with Cristobalite Inclusions
Hardness of 5 to 5.5 on the Mohs scale, black base color with white snowflake-like patches, vitreous luster, amorphous crystal structure with conchoidal fracture, specific gravity around 2.35 to 2.45.
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Physical properties
Hardness of 5 to 5.5 on the Mohs scale, black base color with white snowflake-like patches, vitreous luster, amorphous crystal structure with conchoidal fracture, specific gravity around 2.35 to 2.45.
Formation & geological history
Formed from felsic lava that cools rapidly with minimal crystal growth, where subsequent devitrification causes the growth of radial clusters of cristobalite crystals, creating the snowflake pattern.
Uses & applications
Used frequently in jewelry, polished cabochons, decorative ornaments, and crystal healing practices.
Geological facts
Obsidian was historically used by indigenous peoples around the world to fashion sharp cutting tools, arrowheads, and blades due to its exceptionally sharp conchoidal fracture edges.
Field identification & locations
Easily identified by its distinctive black and white snowflake patterns. It is found worldwide in areas with volcanic activity, such as the western United States, Mexico, and Iceland.
