| Answer | Crossword Clue |
|---|---|
| MOONSTONE | Feldspar variety |
| perthitic | relating to perthite, a variety of alkali feldspar |
| perthite | variety of feldspar containing irregular bands of albite in microcline |
| moonstone | a nearly pellucid variety of feldspar, showing pearly or opaline reflections from within |
| moonstones | MOONSTONE, a nearly pellucid variety of feldspar, showing pearly or opaline reflections from within |
| sunstone | reddish variety of oligoclase feldspar, used as a gem, having a red and bright-yellow play of color |
