Lot of Five Rough Snowflake Obsidian from USA

This is lot of 5 rough Snowflake Obsidian from USA.
Snowflake obsidian is a type of black obsidian with white or grayish spots. These spots are called spherulites, and they are composed of needle-shaped cristobalite, a type of quartz.
Location: Sevier Lake, Utah, USA
Weigh: each lot is about 110 Grams Combined
Average Stone Size: 3.7 x 3.0 x 1.8 Centimetre
The color, size and weight of stone may vary from lot to lot due to each piece made from natural material. The lot you receive will be similar but not identical to the photo.

Interesting Fact: Obsidian forms when lava cools quickly. When lava cools more slowly, crystals begin to form, giving the rock a more textured appearance. Snowflake obsidian can form underground, in cracks that the magma seeps into, or above ground in slow-moving, silica-rich lava flows.