Yellow Huangkou nephrite jade
It is a type of He-Tian Nephrite Jade which is one of the world’s famous types of Jade. It has yellow and green tones, a warm and soft luminosity as if it has been polished with grease. It’s characteristics are similar to yellow Jade and it is valuable to collect and invest.
 
Product of Origin:
This type of Jade are found in Xinjiang(China)- Kunlun Mountain, Ruo Qiang, Qie Muo, and Black Mountain.  The best quality Yellow Cave Jades are found in Ruo Jiang and Black Mountain.
 
Formation:
Yellow Huangkou Jade belongs to White Nephrite Jade family.  The yellow tone comes from metal stains between gaps over a long period of time. The jade found in Ruo Jiang appears yellow due to the area is rich in iron, and as for Black Mountain area is rich in bronze, the Jade appears green.