Raw Obsidian These are caused by various

These are caused by various impurities within the mineral as it is forming

This specimen is referred to as a double terminated diamond quartz

Stone: Tiger Eye with Assorted Beads

This is citrine by scientific standards

Pyrite is a wildly popular simple cubic iron sulfide that is commonly referred to as Fool's Gold

Raw Obsidian These are caused by variousSize: 3. 42 x 2. 50 x 1. 20 in. Weight: 3. 55 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