![]() Oval shape tiger's eye with iron stripes Blue tiger's eye Dark stones are artificially lightened to improve colour using a nitric acid treatment. Red stones are developed by gentle heat treatments. Gems are usually given a cabochon cut to best display their chatoyance. Roman soldiers wore engraved tigers eye to protect them in battle. In some parts of the world, the stone is believed to ward off the evil eye. ![]() Unpolished tiger's eye from South Africa Cultural associations Tiger iron Serpentine tiger's eye from Arizona Sources Ĭommon sources of tiger's eye include Australia, Burma, India, Namibia, South Africa, the United States, Brazil, Canada, China, Korea and Spain. The trade name 'pietersite' is used for a fractured or brecciated chalcedony containing amphibole fibers and promoted as tiger's eye from Namibia and China. These have been cut and sold as "Arizona tiger-eye" and "California tiger's eye" gemstones. Serpentine deposits in the US states of Arizona and California can have chatoyant bands of chrysotile, a form of asbestos, fibres. It is formed by the alteration of crocidolite. The specific gravity ranges from 2.64 to 2.71. Tiger's eye is composed chiefly of silicon dioxide ( SiOĢ) and is coloured mainly by iron oxide. Tiger iron is mined primarily in South Africa and Western Australia. Tiger iron is a popular ornamental material used in a variety of applications, from beads to knife hilts. The undulating, contrasting bands of colour and lustre make for an attractive motif and it is mainly used for jewellery-making and ornamentation. Tiger iron is an altered rock composed chiefly of tiger's eye, red jasper and black hematite. As members of the quartz group, tiger's eye and the related blue-coloured mineral hawk's eye gain their silky, lustrous appearance from the parallel intergrowth of quartz crystals and altered amphibole fibres that have mostly turned into limonite. Tiger's eyeĬhatoyant gemstone that is usually a metamorphic rock with a golden to red-brown colour and a silky lustre. Not to be confused with Eye of the Tiger.
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