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[[Image:Tigers-Eye.jpg|right|thumb|200px|Polished tiger's eye gemstone]]
'''Tiger's eye''' (also '''Tigers eye''', '''Tiger eye''') is a [[Chatoyancy|chatoyant]] [[gemstone]] that is usually yellow- to red-brown, with a silky [[lustre]]. It is a fibrous [[silica|silicified]] [[crocidolite]]; a classic example of [[pseudomorphous replacement]]. An incompletely silicified blue variant is called '''Hawk's eye'''. A member of the [[quartz]] group, its physical and optical properties are identical or very near to those of single-crystal quartz.
The gems are usually cut [[Cabochon|en cabochon]] in order to best display their chatoyancy. Red stones are brought about through gentle heat treatment. Honey-coloured stones have been used to imitate the much higher valued cat's eye [[chrysoberyl]] (cymophane), but the overall effect is unconvincing.
[[image:tiger iron.jpg|left|thumb|200px|Tiger iron]]
'''Tiger iron''' is an altered [[rock (geology)|rock]] composed chiefly of tiger's eye, red [[jasper]] and black [[hematite]]. The undulating, contrasting bands of colour and lustre make for an attractive motif. Tiger iron is a popular ornamental material used in a variety of applications, from beads and cabochons to knife hilts. Along with tiger's eye it is mined primarily in [[South Africa]] and [[Western Australia]].
Other notable sources of tiger's eye include: [[USA]], [[Canada]], [[Namibia]], [[India]] and [[Burma]].
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