Flexi Says:
Tiger's eye is gemstone that displays chatoyancy, or "cat's-eye" appearance, when moved back and forth in light. The play of light is caused by the arrangement minerals that make up the stone, mostly amphibole and quartz, which are stacked like parallel needles. Tiger's eye is fairly common, and can be found in Australia, Burma, India, Namibia, South Africa, the United States, Brazil, Canada, China, Korea and Spain.