| Answer | Crossword Clue |
|---|---|
| GEODE | Rock containing crystals |
| GEODE | Stone containing crystals. |
| GEODES | Stone nodules, containing crystals. |
| GEODE | Hollow rock with crystals |
| GEODE | Rock containing crystal |
| GRANITITE | Rock containing biotite. |
| SHALY | Containing fissile rock. |
| PERIDOTITE | Rock containing olivine |
| SHALE | Rock often containing quartz |
| SIENITE | Feldspar-containing rock: Var. |
| CHERTY | Containing a flintlike rock |
| GEODE | Hollow, crystal-containing rock |
