What does obsidian mean in crosswords?

obsidian means: Dark volcanic glass formed when lava cools very quickly.

Which crossword clues can have obsidian as the answer?

Possible clues for obsidian include "Dark volcanic glass".

Word entry · 8 letters

Best crossword clue

"Dark volcanic glass"

8 letters · collected on this word page

8 lettersSorted abdiinosStarts with OEnds with N1 clues

1O2B3S4I5D6I7A8N

01“Dark volcanic glass”8 letters

Not quite right?

O_______