ALL meanings of obsidian
ob·sid·i·an
O o - noun obsidian hard black rock 1
- adjective obsidian black 1
- noun obsidian a volcanic glass similar in composition to granite, usually dark but transparent in thin pieces, and having a good conchoidal fracture. 1
- noun obsidian A hard, dark, glasslike volcanic rock formed by the rapid solidification of lava without crystallization. 1
- noun obsidian a dark volcanic glass formed by very rapid solidification of lava 0
- noun obsidian a hard, usually dark-colored or black volcanic glass with conchoidal fracture, often used as a gem 0