Jade is a name popularly given to several distinct kinds of ornamental stones of tough compact texture and of color vary ing from nearly white to a very dark green, which have been used from the earliest times in worked forms as weapons, uten sils, ornaments and decorative objects Scientifically, however, the term is restricted to the two minerals Jadeite and Nephrite, and to Chloromelanite, a variety of jadeite rich in iron, of dark color and high specific gravity.

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