Red Jade is a variety of Jadeite, one of two distinctly different minerals that share the name Jade. Nephrite is a calcium magnesium silicate with a smooth surface polish and waxy sheen, usually in shades of white, mid- to deep olive green, brown and black. Jadeite is a sodium aluminum silicate, hard and lustrous, rarer than Nephrite, and usually more expensive. It occurs in various colors, including white-gray green, leafy green, blue or blue-green, emerald green, lavender, pink, red, orange, greenish-black or black. Though they have different compositions, hardnesses, densities and crystal structures, both are exceptionally tough stones, similar in appearance, and equally valuable in metaphysical properties. In this article, both minerals will be referred to as Jade, except for attributes listed that are specific to Red Jade.