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Originally posted by NotTooHappy
Yes, quartz can emit light. It's a process called mechanoluminescence, triboluminescence or fractoluminescence to be exact.
Ute indians used to place quartz crystals in to a ceremonial rattle. When shaken at night, it would emit flashes of light.
Fractoluminesence is also what causes wintergreen Lifesavers to spark in your mouth when you bite down on them and, the glue they use on Curad bandaid wrappers to spark when you pulled the two sides apart.
[edit on 5/28/10 by NotTooHappy]
Originally posted by siree
After reading this thread I decided to test this theory and what do you know, rubbing two crystals together makes some pretty obvious sparks. just recorded this on a digital camera this morning. You can totally see the light.