It was not invented. It is a natural mineral and has been used by man since the earliest time.
one way is they ate fruit and another way is they invented the lightbulb.
Obsidian is a naturally occurring volcanic form of glass.
Obsidian
No. Obsidian is brittle.
Mahogany Obsidian
No. Obsidian is natural glass, mostly silica. Obsidian is of volcanic origin.
Obsidian is, itself, a mineral.
Obsidian is a natural glass.
Neither, obsidian is a glass.
yes obsidian is a crystal.
Obsidian is an igneous rock.
Other names for obsidian is Apache tears, volcanic glass, and Black obsidian.