Related Clues:
- Often-transparent mineral
- Muscovite prophet's pronouncement
- Crystal-lined cavity in rock
- Insulating mineral
- Muscovite's book referred to by speaker
- Small rock cavity
- Rock-forming mineral
- Crystal-lined cavity
- Shiny silicate mineral
- It has near-perfect cleavage
- Piece in a rockhound's collection
- Thinly layered mineral
- Mineral covered in chemical
- Coming from Michigan half case of mineral
- Mineral used in auto paint