Tiger's eye

Tiger's eye (also called tiger eye) is a chatoyant gemstone that is usually a metamorphic rock with a golden to red-brown colour and a silky lustre. 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.

This article is about the gemstone. For the horse eye color, see Tiger eye. For the short story, see The Tiger's Eye. For the characters in the Sailor Moon series, see Amazon Trio.
Not to be confused with Tiger Eyes.
Not to be confused with Eye of the Tiger.
Tiger's eye
General
CategoryMineral
Formula
(repeating unit)		Silica (silicon dioxide, SiO2)
Identification
Colourgolden to red-brown
Mohs scale hardness6.5-7
LusterSilky
Specific gravity2.64–2.71
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