© 2003 by the Center For Social Research, Parkland College
Use the "back" button on your browser screen to return to the previous page.
The texture in purer expressions is very fine.
Luster is glassy.
While swirls of brown, red, green, and semi-translucency occur, black is the classic color.
There are no fossils in obsidian.
Obsidian is a form of volcanic glass that has no crystals or crystalline structure.
Obsidian is not heat treated.
The illustrated specimen was recovered from the base of the Obsidian Cliff Locality, Yellowstone National Park, Wyoming.
Click on image for full view.