Related Clues:
- Entrance blocked at front by a stone
- Mineral in some geodes
- Steer round extremely nasty stone
- Stone with curved bands
- Traditional gemstone for a seventh wedding anniversary
- Material for a swirly marble
- Gem with bands
- Mortar and pestle stone
- ... that begins at the Watergate Hotel / Black gem
- Black gemstone used to make beads
- Banded gemstone or marble
- Stone, a hinged barrier
- Stripy stone
- Banded variety of quartz
- Stone with lace and moss varieties