| Answer | Crossword Clue |
|---|---|
| whinstone | a hard and compact rock also WHUNSTANE |
| whinstones | WHINSTONE, a hard and compact rock also WHUNSTANE |
| whunstanes | WHUNSTANE, (Scots) a hard and compact rock also WHINSTONE |
| whunstane | (Scots) a hard and compact rock also WHINSTONE |
| porcelain | a hard, fine-grained, sonorous, nonporous, and usually translucent and white ceramic ware that consists essentially of kaolin, quartz, and a feldspathic rock and is fired at a high temperature called also hard-paste porcelain true porcelain |
| quartzite | An extremely compact, hard, granular rock consisting essentially of quartz. It often occurs as silicified sandstone, as in sarsen stones |
