Related Clues:
- Source of igneous rocks
- Material for a volcanologist
- Rolling stone?
- Mount Pelee output
- Very hot rock
- Red-hot melted rock
- Molten rock in the earth
- Volcanic rock material
- ___ lamp ('60s novelty)
- Igneous rock's source
- Molten rock from volcano
- Volcanic molten rock
- Molten rock from a volcano
- Molten rock from volcanoes
- Molten volcanic rock