| Answer | Crossword Clue |
|---|---|
| greisen | a crystalline rock consisting of quartz and mica that is common in Cornwall and Saxony |
| gneissic | metamorphic rock, generally made up of bands that differ in color and composition, some bands being rich in feldspar and quartz, others rich in hornblende or mica |
| gneiss | metamorphic rock, generally made up of bands that differ in color and composition, some bands being rich in feldspar and quartz, others rich in hornblende or mica |
