:For other uses, see Jade (disambiguation).
An ornamental stone, jade is a name applied to two different silicate minerals. Nephrite is a form of the amphibole actinolite (a mineral that also includes a form of asbestos). The second, the mineral jadeite, is a pyroxene. Nephrite has the formula Ca₂(Mg, Fe)₅Si₈O₂₂(OH)₂. Jade...(continue reading)