Related Clues:
- Crystalline stone
- Rock with a crystal inside
- Thunderegg cousins
- Rock that's glittery inside
- Show-and-tell rock
- Quartz-filled rock
- All-natural sparkler
- Rock-shop curiosity
- It has a crystal inside
- Shiny, hollow paperweight
- Rock cavities lined with crystals — see dog (anag)
- Showcases of rock bands?
- Crystalline stones
- Rock with a glittery inside
- Crystal Cave is one