Hawk's-Eye

Hawk Eye is a microcrystalline, fibrous and opaque variety of quartz. It crystallizes in the trigonal crystal system accordingly, but it is only microscopic crystals in massive mineral aggregates, which are similar in structure in stratified, parallel layers of the agate. In contrast to this, however, only the colors appear dark blue, blue-gray and blue-green. In addition, results from deposition of crocidolite ( hornblende ) an areal silky shine, the so-called chatoyancy ( cat's eye effect).

The Hawk Eye is exclusively used as a gemstone.

Education and Locations

The Hawk Eye is found mainly in South Africa and Western Australia. Is through displacement pseudomorphs in which crocidolite replaced by quartz, there arises a red-brown tiger's eye.

Use as a gemstone

The Hawk Eye is like the related Tigereye a popular gemstone that is mostly ground into cabochon shape to highlight its luster and the chatoyancy. The movement in the stone over the surface moving light stripes reminiscent of the eye of raptors, especially falcons ( hence the name ). Also platy forms brooches or tie clasps processes are widespread.