Topaz is named from Greek "topazion" for a type of gemstone, probably after Sanskrit "tapas" - fire, alluding to the brilliance of gem-quality material. Topaz has been known from antiquity . Blue Topaz does occur in nature, but is rare and almost always light color. Colorless or lightly colored topaz goes through processes that create the blue color. Among the colors created, most saturated blue color topaz is named London blue topaz.
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