Jade is a complex gemstone , formed as a result of the processes of metamorphism , in areas called subduction zones, where the Plates forming the Earths crust meet and are drawn down into the layer beneath the crust , the Mantle.
Jade has two varietes Jadeite , sodium aluminium silicate and Nephrite, a calcium magnesium iron silicate.
Jade has been used by humans since Neolithic times over 5000B.C. It has always been greatly revered in Chinese culture , being a symbol of good luck and good health . It is also thought to bring harmony , peace and virtue .