| Answer | Crossword Clue |
|---|---|
| chertier | compact rock consisting essentially of microcrystalline quartz |
| cherty | compact rock consisting essentially of microcrystalline quartz |
| cherts | compact rock consisting essentially of microcrystalline quartz |
| chert | compact rock consisting essentially of microcrystalline quartz |
| quartzite | An extremely compact, hard, granular rock consisting essentially of quartz. It often occurs as silicified sandstone, as in sarsen stones |
| quartzitic | granular metamorphic rock consisting essentially of quartz in interlocking grains |
| quartzites | granular metamorphic rock consisting essentially of quartz in interlocking grains |
| chert | a rock resembling flint and consisting essentially of a large amount of fibrous chalcedony with smaller amounts of cryptocrystalline quartz and amorphous silica |
