1. strong light: under strong light or sunlight, illuminate with opaque metal cards or lamps, and observe the color tone around and inside the leather shell, the trend of green, the change of luster and the intensity of reflection. The real jadeite original stone is gorgeous and natural in color, with obvious green trend, strong luster and anti-brightness, which has a gradual relationship with the surrounding parts.

2. Songhua: There are some mossy blocks, patches and strips on the epidermis of jadeite original stone, which are called "Songhua". It is the trace left by green on the original jadeite raw material, which gradually fades after weathering. The depth of the color of Songhua: If the color is deep and heavy, there will be more green parts inside and the color will be heavier.

3. Now, after a long time, the green color naturally fades; Another situation is that the original green substance in your jade is a mineral. Now after a long period of friction and air contact, that mineral has been oxidized (this white part is usually close to the wrist skin). Finally, after firing, jade will turn white.

In this way, the color of jadeite is partially enlarged. In addition to sweating, skin glands will secrete oil and penetrate into the micro-cracks of jadeite, making jadeite look more transparent. Through internal reflection, the colorless part of jadeite also sets off green, which is why jadeite is greener and brighter when worn.

5. From the perspective of leather shell, leather shell reflects the internal characteristics to some extent. In general, if the skin is thick, the crystal is thick, the skin is thick, the structure is loose and there are many cracks, the internal quality of jadeite will not be good, but there are exceptions. On the contrary, the internal quality of the shell will be relatively good.