Snowflake Obsidian

Physical Properties

Hardness: 5-6 (Mohs); Color: Black with white/grey 'snowflake' patches; Luster: Vitreous/Glassy; Structure: Amorphous (non-crystalline matrix); Cleavage: None/Conchoidal fracture.

Formation & Geological History

Formed from rapidly cooling felsic lava where water or certain minerals undergo devitrification, forming radial clusters of cristobalite crystals (the snowflakes). Found in volcanic regions.

Uses & Applications

Primarily used in jewelry (cabochons, beads), decorative carvings, and as a popular specimen for rock collectors and metaphysical healers.

Geological Facts

The white 'snowflakes' are actually radial clusters of white cristobalite crystals growing within the obsidian glass. It has been used for millennia to make cutting tools and arrowheads.

Field Identification & Locations

Identify by its glass-like texture, sharp conchoidal edges when broken, and distinctive white internal spots. Commonly found in areas of recent volcanic activity such as Utah or Iceland.

Identified on: 5/3/2026

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