| Answer | Crossword Clue |
|---|---|
| glass | material (as obsidian) produced by fast cooling of magma |
| Answer | Crossword Clue |
|---|---|
| glass | material (as obsidian) produced by fast cooling of magma |
Crossword
a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.