Tumbled Polished Snowflake Obsidian - 8oz. (~20pc.)

This is polished Snowflake Obsidian which is like regular obsidian, but due to partial crystallization of the glass it can leave white 'snowflake' pattern. Obsidian is formed in the latest stage of volcanic eruptions; the silicas left over, after most of the other elements and water have been used up, are ejected or flow out and rapidly chilled at surface temperatures.

You will receive 8 ounces ounces (~15 to 20 pieces) chosen at random. The photos are representative of what the mineral looks like. These polished minerals are great for educational use or gifts for kids.

Snowflake obsidian is found near Sevier Lake in Millard County, Utah. It is a natural, volcanic "glass" that is formed when molten rock cools so quickly that that atoms do not have enough time to arrange themselves into crystals. Instead, the molten material solidifies into an amorphous solid called a glass.
The "snowflakes" in the obsidian are small, white, radially clustered crystals of cristobalite, a mineral polymorph of silica.

Obsidian was important material for many ancient people. It was used for making tools, weapons, jewelry and decorative items. It was a major barter material for Native Americans. When broken its conchoidal fracturing results in extremely sharp edges which made it ideal for making knives, scrapers, arrowheads and spearpoints. It is even occasionally used today to produce surgeons scalpels as the edges are several times sharper (only 3 nanometers) than blades that can be produced from steel.
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Snowflake Obsidian
Millard County, Utah, USA
Average 1" across
8 ounces (~15-20 pieces)