Obsidian (/ˌɒbˈsɪdiən/; /əb-/) is a naturally occurring volcanic glass formed when lava extruded from a volcano cools rapidly with minimal crystal growth. It is an igneous rock. Obsidian is produced from felsic lava, rich in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium.

Where can I find obsidian?

Explore obsidian where cooling is rapid in the margins of lava flows. Glass Buttes in central Oregon is one of the best places to find obsidian in the U.S. Pieces of fist size can be found on the surface in abundance here. Examine the obsidian's general presence. It has a distinctive appearance of smooth glass.

How is obsidian extracted from the earth?

Because obsidian is easy to break (like glass), collecting samples from an outcrop is relatively simple. A good rock hammer will easily break large chunks of volcanic glass into small, usable pieces. However, make sure to bring a good collection bag because obsidian tends to be quite heavy.