Obsidian Square Weight: ~ 8 oz

Weight: ~ 8 oz

There are a few hairline cracks that were likely stabilized

Obsidian forms as lava cools very rapidly and is not considered a mineral as its lacks any form of crystal structure

nutrient-rich waters to house many species of these trilobites

Chemical Formula: SiO₂ (Amorphous Volcanic Glass)

Obsidian Square Weight: ~ 8 ozSize: 2. 0 in. Weight: 1. 2 oz Chemical Formula: SiO (Amorphous Volcanic Glass) Commonly found in Italy, Scotland, Mexico, Argentina, Greece, Iceland, Russia, New Zealand, Japan, and The United States. Obsidian is a naturally occurring form of volcanic glass. Obsidian forms as lava cools very rapidly and is not considered a mineral as its lacks any form of crystal structure. It is said that obsidian is actually a mistranslation from Pliny the Elder's