mineral

Polished tiger’s-eye pebbles

Tiger’s-eye, a fibrous quartz variety; SiO₂, commonly with iron-oxide inclusions

AI-generated identification · may be incorrect

Golden-brown bands and silky chatoyancy are visible on the polished surfaces. Quartz has Mohs hardness 7, a trigonal crystal structure, vitreous-to-silky luster, and no cleavage; specific gravity is about 2.6–2.7.

Identified October 11, 2026More mineral →

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Physical properties

Formation & geological history

Forms when crocidolite fibers are replaced by silica, with iron oxidation producing golden-brown color. Deposits are associated especially with ancient iron-rich rocks, notably South Africa’s Precambrian formations.

Uses & applications

Used for beads, cabochons, carvings, and decorative objects; also collected as a polished ornamental stone.

Geological facts

Its moving, cat’s-eye-like band of reflected light is called chatoyancy.

Field identification & locations

Identify it by golden-brown parallel bands and a shifting silky sheen; major sources include South Africa, Australia, India, and Brazil. These appear to be small tumbled or polished pieces.