Jade's appreciation and maintenance

To obtain a real and choice Green Jade Bangle , you should take pains to learn and appreciate it. The criteria lie in the brightness of color and luster, compactness of inner structure, and the delicacy of the craftwork. For example, nephrite creates an oily luster and jadeite creates a vitreous luster. Tiny cracks can lower its value; on real one, air bubbles cannot be seen; the more lenitive the higher quality of Chinese Jade Ring and so on.