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Snowflake Obsidian Cabochons
Obsidian is lava that has cooled too rapidly for crystallization
to occur. It is not a true mineral but is sometimes classified as mineraloid. It has a smooth, glassy appearance and the fracture
edges are extremely sharp. Obsidian consists of at least 70 percent silicon dioxide (SO2) but impurities can create a wide
range of color and visual effects. The "snowflakes" can be more accurately described as small inclusions of radially
clustered crystals of cristobalite, a polymorph of quartz and tridymite.
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Simply wonderful free-form cabochon with great "snowflakes." This is a great gem! Approx. size: 13x27
Weight: 11.8 cts.
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