Adjective "obsidian" definition and examples

(Obsidian may not be an adjective, but it can be used as an adjective, click here to find out.)



Definitions and examples


A hard, dark, glass-like volcanic rock formed by the rapid solidification of lava without crystallization.
  1. 'The earliest mirrors were of obsidian, a black volcanic rock that could be carved and polished.'
  2. 'The presence of basalt and obsidian is a sign of volcanic activity and the instability of the earth's crust in this area.'

More definitions

1. a volcanic glass similar in composition to granite, usually dark but transparent in thin pieces, and having a good conchoidal fracture.

More examples(as adjective)

"scrapers can be obsidian."


Mid 17th century: from Latin obsidianus, error for obsianus, from Obsius, the name (in Pliny) of the discoverer of a similar stone.