
gemstone
Blue Tiger's Eye
Silicon dioxide with crocidolite inclusions (SiO2)
AI-generated identification · may be incorrectHardness 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.
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