Related Clues:
- Very special person
- Emerald or opal
- Opal, for one
- It should never be put in a microwave
- Thing in an expensive ring
- Ruby or emerald, e.g
- It sets off airport detectors
- ___ detector (airport screening device)
- A diamond is one
- Conductive stuff
- What a detector may detect
- 53-Across, for one
- Electropositive material
- Mercury or cobalt
- Cobalt, for one