The Difference Between Jade and Jadeite 

In Chinese words, “the finest of stone is Jade”. 

The qualities of jade stone are hard and fine, and with uniform hue and color, and beautiful crystal-like shine. 
Jadeite is one of the jade stone’s forms. And so a jade stone is not necessary Jadeite. 

In Chinese, Jadeite is called “Fei Cui”. And this name is come from a bird’s name. This bird has very colorful and beautiful feathers. The male bird has red feathers, and it called as “Fei” bird. The female bird has green feathers, and it called as “Cui”. In combination, they are called “Fei Cui”. 

There is a wide range of variations in color of Jadeite. The color is mostly found in white, green, red, purple, blue, yellow, black and pink.   More .... http://www.hkja.com.hk/en/about_jade.php