What is JADE?

Several distinct minerals are known by this name, the true jade being naphrite, an anhydrous double silicate of calcium and magnesium. Jadeite, which resembles it, is a silicate of aluminium and sodium. Jade is greenishwhite to deep green in colour, is a favourite material for making ornaments and amulets, and is nearly as hard as quartz. It is extensively found in China, New Zealand, Eastern Turkestan, Siberia, and the Philippine Islands.

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Definition of  JADE