Tiger's Eye

Hardness: 6.5-7 Mohs; Color: Golden yellow to brown; Luster: Silky; Crystal structure: Trigonal/Fibrous; Specific Gravity: 2.64-2.71; Notable for chatoyancy.

Formed through the pseudomorphism of crocidolite (asbestos) by silica. The original fibrous structure is preserved while being replaced by quartz, with iron oxidation producing the golden-brown hues. Most deposits are found in Precambrian rock units.

Primarily used as a gemstone in jewelry (beads, cabochons), carvings, and ornamental objects. It is also a popular specimen for crystal healing collectors.

Tiger's Eye exhibits an optical effect known as chatoyancy or the 'cat\'s eye effect,' caused by the reflection of light off the parallel mineral fibers. If the stone is heated, it turns red (Red Tiger\'s Eye), and if naturally oxidized differently, it may remain blue (Hawk\'s Eye).

Identify by its characteristic moving bands of light (silkiness) and yellow/gold/brown color scheme. It is most commonly found in South Africa, Australia, India, and Burma. Collectors look for sharp, clean chatoyancy without dull spots.