The Nephrite Jade is a silicate of lime and magnesium very common in China. - The Jadeite Jade rare in China (often imported from Burma) has grown during the Ching Dynasty "Emperor Qianlong." It is a silicate of aluminum and sodium. - The color of jade varies from white to dark green(almost black). It is possible to found different color of Jade: White, black, green, pink to blue (the color changes depending on the amount of iron oxide, and chromium oxide).