Related Clues:
- Oil-rich mineral
- Fossil holder
- Kerosene source
- Fissile rock
- Fracking rock
- Looking back, police force that is no good with rock transformation
- Rock used for flagstones
- Hard stuff derived from champagne is sensational!
- Thin-layered rock
- Hard stuff at rock festival presumably sounds lovely
- __ oil
- Model singes branded rock
- Clayey rock
- Soft sedimentary rock
- Delicate-sounding rock