Related Clues:
- Seam makeup
- 'Portlandia' state: Abbr
- Calcite for example
- Mineral in the raw
- Bauxite, e.g
- Matter of miner concern
- Precious metal source
- Source of iron, e.g
- 'Black diamonds'
- Set alight hard rock or it'll leave you cold
- Mining extract
- Makeup of some seams
- Foundry delivery
- Magnetite, e.g
- Cinnabar or galena