4 x 1 x 5cm Tiger's eye is a semiprecious stone that is formed when parallel veins of crocidolite fibers are first altered to iron oxides and then replaced by silica. As a result it is more opaque, and creates a rich yellow to brown color. Tiger Eye can be found in Australia, Burma, United States, Brazil, China, and many other countries. ***Due to natural variations in stones, the appearance will vary***