Minerals, Metals, and Other Materials

Rocks and Minerals

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 first altered to iron oxides and then replaced by silica. The gem has a rich yellow to yellow-brown or brown color.


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