Global Mining Sites
Obsidian is found in many locations worldwide. It is confined to areas of recent volcanic activity. This stone is older than a few million years are rare because the glassy rock is rapidly destroyed or altered by weathering, heat, or other processes.Significant deposits of obsidian are found in Argentina, Canada, Chile, Ecuador, Greece, Guatemala, Hungary, Iceland, Indonesia, Italy, Japan, Kenya, Mexico, New Zealand, Peru, Russia, United States, and many other locations.
History
Obsidian was first mentioned in the Latin scripted book “Natural History” by Pliny the Elder in 77 AD. Traces of obsidian being used as weapon/tools date as far back as 7,000 years ago.
Obsidian was highly valued in the ancient world for arrowheads and blades as they were easily able to be worked with, yet very durable. This stone was also polished for the sole purpose of being used as early mirrors before glass was established.
Appearance
Obsidian is an igneous rock that forms when molten rock material cools so rapidly that atoms are unable to arrange themselves into a crystalline structure. The result is a volcanic glass with a smooth uniform texture that breaks with a conchoidal fracture.
Black is the most common colour of obsidian. However, it can also be brown, tan, or green. Occasionally two colours of this stone will be swirled together in a single specimen. The most common colour combination is black and brown swirled together, called “mahogany obsidian”.