Emeralds are purple, collectively referred to as purple jade, but they are divided into five categories according to the saturation and depth of their colors, namely royal purple, red purple, blue purple, violet and pink purple. Among them, royal purple jade has higher value, purple jade is more popular, and pink purple jade has lower market value.

If there is purple jade, it is generally called violet jade, which is named because its color is very similar to violet flowers. The jewelry industry also calls violets "Chinese toon" or "spring", which can be divided into red spring, purple spring and blue spring by color.

Jade can be divided into three colors: pink purple, eggplant purple and blue purple, of which pink purple is the best and blue purple is the worst.