Nephrite Nephrite can be found in a translucent white to very light yellow form which is known in China as "mutton fat" jade, in an opaque white to very light brown or gray which is known as "chicken bone" jade, as well as in a variety of green colors. Western Canada is the principal source of modern lapidary nephrite. Nephrite jade was used mostly in pre-1800 China as well as in New Zealand, the Pacific Coast and Atlantic Coasts of North America, Neolithic Europe, and southeast Asia. The name "nephrite" is derived from "lapis nephriticus", which in turn is derived from
Guianan cock-of-the-rock their definitive plumage at around three years. Juvenile females look almost identical to their adult counterparts. Guianan cocks-of-the-rock have a total length of approximately and a total weight of around . The two species of cock-of-the-rock are allopatric, and therefore do not meet with one another. The plumage of male Andean is redder and its wings are mostly black, lacking the orange colouration seen on the male Guianan. The female Andean is reddish brown rather than the brownish-gray of the Guianan. The Guanian cock-of-the-rock is one of two species of genus "Rupicola". It was described by Carl Linnaeus in 1766