Gem hunters have always been natural geologists, seeking the mother lode long before researchers explained how gems and minerals form. Now, scientists want to officially link precious gems to their ...

The spectral “hole” forms due to coherent population oscillations that are set up when an argon-ion laser operating at 514.5 nm is shone on the ruby. The oscillations lead to a rapid variation in the ...

Researchers in New York state have slowed light down to the speed of a train using a ruby at room temperature 1. Robert Boyd and colleagues at the University of Rochester cut the speed of light in a ...