Related Clues:
- Gem with colored bands
- Certain igneous rock
- Gem used in cameos
- Chalcedony used in cameos
- Dark volcanic rock
- Quartz used as a gem
- Stone-like marble with coloured layers
- Dark rock of volcanic origin
- Stone-like marble with different colours in layers
- Black volcanic rock
- Marbled stone with layers of colours
- Type of rock is a blast, oddly
- Quartz with bands of colour
- Stone-like marble with layers of colours
- Stone like marble with layered colours