File:Tiger's_eye.jpg · Wikimedia Commons · See Wikimedia Commons
Key facts
- Category
- Minerals
- Formula
- Silica ( SiO 2 )
- Colour
- golden to red-brown
- Mohs scale hardness
- 6.5–7
- Luster
- Silky
- Specific gravity
- 2.64–2.71
via Wikipedia infobox
~3 min read
Encyclopedic overview
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.
Other forms of tiger's eye
Excerpted from Wikipedia’s “tiger's eye” article, available under the CC BY-SA 4.0 licence.