« Advice for the girls | Main | Quote Of the Day »

Science Questions

What is a tiger's eye?

Tiger's eye is a semiprecious quartz gem that has a vertical luminescent band like that of a cat's eye. To achieve the effect of a cat's eye, veins of parallel blue asbestos fibers are fist altered to iron oxides and then replaced by silica. The gem has a rich yellow to yellow-brown or brown color.


TrackBack URL for this entry: