| Answer | Crossword Clue |
|---|---|
| petrous | like stone, especially in hardness. |
| petrous | like stone, esp. in hardness; stony; rocky |
| yag | a synthetic yttrium aluminum garnet of marked hardness and high refractive index that is used especially as a gemstone and in laser technology |
| petrous | resembling stone in hardness |
| stony | resembling or characteristic of stone, esp. in hardness |
| stoney | resembling or characteristic of stone, esp. in hardness |
| stoniest | resembling or characteristic of stone, esp. in hardness |
| stonily | resembling or characteristic of stone, esp. in hardness |
| stonier | resembling or characteristic of stone, esp. in hardness |
