Obsidian

Definition:

• (n.) A kind of glass produced by volcanoes. It is usually of a black color, and opaque, except in thin splinters.

Compare obsidian with other words:

jelly vs. obsidian

conchoidal vs. obsidian

obsidian vs. onyx

coal vs. obsidian

obsidian vs. pyroxenite

obsidian vs. perlite

black vs. obsidian

obsidian vs. volcano

glass vs. obsidian

knap vs. obsidian