Related Clues:
- Light reflector
- Telescope component
- Egyptian monument
- Spectrum revealer
- Giza attraction
- Light-refracting object
- Rainbow creator
- Refracting device
- Thing on the cover of 'Dark Side of the Moon'
- Spectrum-forming solid
- Royal tomb of a sort
- Type of scheme
- Spectrum-showing device
- Structure on a $1 bill
- Color-full device?