Both Jadeite and Nephrite Jades are metamorphic rocks made up of tiny interlocking mineral crystals. These interlocking crystals make both gems exceptionally tough. They come in a wide variety of color, the translucent emerald green Jadeite known as Imperial Jade being the most valuable. 

 

Green Jade
Varies from intense green of Imperial Jade to the lighter speckled shades of Jade. 

Lavender Jade
This color of Jade is highly valued in fine jewelry. In crystal healing, Lavender Jade alleviates emotional hurt and provides spiritual energy. 

Old Jade
An earthy mottled mix of brown and yellow Jades. 

White Jade
Fine White Jade is highly esteemed in the Far East. 

Yellow Jade
Metaphysically this is a cheerful and energetic stone of assimilation.