Rock Identifier
Blue Tiger's Eye (Silicon dioxide with crocidolite inclusions (SiO2)) — gemstone
gemstone

Blue Tiger's Eye

Silicon dioxide with crocidolite inclusions (SiO2)

AI-generated identification · may be incorrect

Hardness of 7 on the Mohs scale, blue-grey color, silky luster with chatoyancy, and a trigonal-trapezohedral crystal system.

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Physical properties

Hardness of 7 on the Mohs scale, blue-grey color, silky luster with chatoyancy, and a trigonal-trapezohedral crystal system.

Formation & geological history

Formed as a pseudomorph when quartz replaces fibrous crocidolite asbestos, typically within metamorphic or hydrothermal environments.

Uses & applications

Widely used in jewelry, beads, ornamental carvings, and holistic crystal collections.

Geological facts

Also known as hawk's eye, the blue variety forms before iron oxidation turns the fibers into the classic golden-brown tiger's eye.

Field identification & locations

Identified by its striking cat-eye reflection and grey-blue bands; commonly sourced from South Africa, Australia, and India.