nephrite
noun
neph·rite ˈne-ˌfrīt 
: a compact tremolite or actinolite that is the commoner and less valuable kind of jade and that varies in color from white to dark green or black
Example Sentences
Recent Examples on the Web Jade is a complex stone to purchase well, because there are two different varieties (nephrite and jadeite) and numerous grades, colors, and subtle qualities to consider. 
Augusten Burroughs, Town & Country, 15 Sep. 2016 Jade is a complex stone to purchase well, because there are two different varieties (nephrite and jadeite) and numerous grades, colors, and subtle qualities to consider. Augusten Burroughs, Town & Country, 15 Sep. 2016
Augusten Burroughs, Town & Country, 15 Sep. 2016 Jade is a complex stone to purchase well, because there are two different varieties (nephrite and jadeite) and numerous grades, colors, and subtle qualities to consider. Augusten Burroughs, Town & Country, 15 Sep. 2016 Word History
Etymology
German Nephrit, from Greek nephros; from its formerly being worn as a remedy for kidney diseases
First Known Use
1794, in the meaning defined above