Obsidian snowflake is a black variety of obsidian that features inclusions of a white mineral, which appear similar to snowflakes when polished. This mineral has been identified as cristobalite, a stable form of silica, in many samples. In some areas, the radiating crystals are believed to be more reminiscent of flowers than snowflakes, resulting in the material’s alternate moniker, flowering obsidian. The most notable occurrence of the unusual black and white glass can be found near Milford, Utah.