Nephrite is the main source of this gem; it comes in white, red & dark green, which is the most valuable type
[DOC] [TLE] Jade Buying Guide  Jade Auction Records  Lotus Gemology [PAR] Jade is one of the most expensive gems in the world, yet one of the least ... One 
of the earliest domestic sources of the stone was the White Jade (Yurungkash) 
and Black Jade ...