| tiger
eye (also Tigers eye, Tiger eye) is a chatoyant
gemstone that is usually yellow- to red-brown, with a silky luster.
It is a fibrous silicified crocidolite (blue asbestos), 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. |