Related Clues:
- Quartz
- Form of agate
- Mineral with coloured layers
- Semi-precious stone used for cameos
- Variety of agate used for making cameos
- Bachelor, sailor from Black Rock
- Stone seen in Mammoth Cave National Park
- Stone for a Cancer, traditionally
- Deep black gem
- Black quartz
- No way back for youth leader to find cross used to make jewellery
- Black gem
- Panther figurine material
- Lava rock
- It's a blast disfigured by volcanic rock