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polychrome Jasper
Ultraviolet fluorescence: Short UV=yellow
Rose-like calcite is found in a variety of locations around the world
Ocean blue or mint green
a nickel-magnesium silicate ore
Tiger Eye Aura Crystal Bracelet succulents polychrome JasperIn the late 1800s, geologists thought that tiger's eye and the related blue green stone, hawk's eye, were quartz replacements of crocidolite a blue form of asbestos. They believed that quartz replaced most of the crocidolite, and the remaining asbestos provided the bluish color. Tiger's eye is formed when parallel veins of crocidolite (blue asbestos) fibres are first altered to iron oxides and then replaced by silica. As a result it is more opaque,