Nephrite n. : A hard compact mineral, of a dark green color, formerly worn as a remedy for diseases of the kidneys, whence its name; kidney stone; a kind of jade. See Jade.

Example:
Why does Nephrite jade smell bad?

Taxonomy
jade, nephrite jade, China, Māori, kidney stone, free encyclopedia, deposits, gemstone, mineral species, Jadeite jade, stones, lapis, very light, utilitarian, rivers, jade collection, Jade jewellery, Zealand jade.

Defination from the web:
nephrite jade in China for utilitarian and ceremonial jade items were the now depleted deposits ... There, white and greenish nephrite jade is found in small quarries and as pebbles and boulders in the rivers flowing from the Kuen-Lun mountain ...