I want to throw out an experience I had as I think it relates.
My cat meowed plaintively for a couple days then revealed that she had a HUGE abcess near her anus. There was a crater. There was a thin, say 6mm wide, strip of dead skin holding together the sides of a 6cm bloody, gory wound...
Yes. An illusion suggesting an internal light source. The incident light = the output light for both rough glass and faceted diamond. The faceting just gathers the incident light and controls the output angles to produce bright spots. Place a diamond in the sun in an otherwise darkened room...
The junky glass sends the light out in all directions equally. A faceted diamond sends the light out in only a few directions. As you turn it, you see a few sparkles and your brain remembers those. It forgets that many times it's actually less bright than a hunk of glass. When the light is...
Heck, this is Science fiction.
Back on earth, bombard some atoms. Use lasers to cool some of the fragments, (the free Gluons) and trap them in a Miley Bottle. On your spaceship, when you're ready for some energy, put deuterium into your reaction chamber and introduce a few gluons. They act...