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Tiger's eye (tigers eye, tiger eye, tiger iron) is a member of the quartz group of Chalcedonies. It is one of the chatoyant gemstones. Chatoyancy exhibits a changeable silky luster as light is reflected within the thin parallel fibrous bands. This effect is due to the fibrous structure of the material.
Tiger's eye is a yellowish-brown to reddish-brown gemstone that has a silky luster. This gemstone has bands of yellow and brown; when viewed from the opposite direction, the colors are reversed. Tiger's eye is usually highly polished and set as a cabochon (or cut as a bead) to display the stone's chatoyancy (light reflected in thin bands within the stone). Tiger's eye is a type of chatoyant quartz with fibrous inclusions (especially crocidolite). This stone is sometimes heat-treated. Tiger's eye has a hardness of 7.0. Green-grey varieties of this stones are called cat's-eye quartz. Blue-grey to bluish varieties are called hawk's-eye. Deep brown varieties of this stone are called bull's-eye or ox-eye.
Many legends about quartz say that wearing tiger's eye (which is a form of quartz) is beneficial for health and spiritual well being. Legend also says it is a psychic protector, great for business, and an aid to achieving clarity.
Tiger's Eye is the Planetary stone for Gemini (May 21-Jun. 20) and the accepted gem for the ninth wedding anniversary.
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