Obsidian Square It has been found in

It has been found in many ancient Egyptian artifacts

Light entering the mineral reflects off these inclusions

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

There are a few hairline cracks that were likely stabilized

Stone: Carnelian

Obsidian Square It has been found inSize: 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