Tiger's eye and Hawk's eye gemstones

Tiger's eye and Hawk's eye gemstones

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Credit: NATURAL HISTORY MUSEUM, LONDON/SCIENCE PHOTO LIBRARY

Caption: Tiger's eye and hawk's eye gemstones. These gemstones are formed when the mineral crocidolite (blue asbestos) is replaced by quartz. Hawk's eye (bottom) retains the original blue colour while tiger's eye (top) contains a residue of iron oxide, forming a golden to red-brown colour.

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Keywords: aerinite, blue asbestos, crocidolite, double chain inosilicate, gemstone, geological, geology, hawk's eye, hawks-eye, inosilicate, iron oxide, london, mineral, mineralogy, native metal, natural history museum, one, quartz, reflective, residue, riebeckite, shiny, silicate, smooth, specimen, still life, studio shot, tectosilicate, tiger's eye, tigers-eye

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