Tiger's eye is a mixture of brown and yellowish minerals. It consists of quartz as the main component, limonite and riebeckite.
Since ancient times, it has been considered a semi-precious stone. He has two "cousins": "cat's eye" and "hawk's eye". Used in jewelry and various art objects.
The mineral called "bull's eye" is a type of tiger's eye, which occurs due to an increase in ambient temperature above 70 ° C. A bull's eye can be faked by heating a tiger's eye with a simple lighter.