FELDSPAR
| Date | Clue |
|---|---|
| 2022-12-10 | Rock-forming mineral that makes up over half of the earth's crust |
| 2009-09-20 | Mineral that crystallizes from magma |
| 2004-01-25 | Important constituent of igneous rocks |
| 1998-05-27 | Igneous rock constituent |
| 1997-09-18 | Crystalline mineral |