"Water foam" is like the water in the small ditch from high to low. The foam on the surface layer of the water splash has a large amount of foam, no green, and the structure is not as tight as the gloss. Jade jade species, when we face the glass species, the stone of the egg white, do not prevent whether it is a water foam first.

First, the magnifying glass observation method

"Water foam" is mainly composed of albite, which is not green, and has more white "stone" and "cotton". As we all know, Cui is an important feature to distinguish jade and other similar jade. The appearance of jadeite is "snow flake", "mosquito wing", "shaxing", etc.; and the cleavage surface of water foam can appear Similar to the jadeite "sand star", but not obvious, only the appearance of zero stars, and the star flash of the water foam is not called green (Note: This method is limited to the identification of unpolished jade and water foam, It is not suitable for the identification of finished products.)

Second, the handcuff method

Since the density of "water foam" is much smaller than that of jade, it is obviously lighter than jade. The proportion of water foam is (2.57~2.64), the proportion of jadeite (3.32), the weight of water foam is about 1/3 of the same volume of jadeite. If you are a newbie, you should hold a water foam in one hand and a natural one in the other. Compared with the jade, the water foam has a feeling of lightness, and the jade has the feeling of being beaten. When there is more contrast, it will naturally feel.

Third, the tapping method

The "water foam" knocking sound is dull, not as good as the ordinary jade knocking sound.

Fourth, the characterization method

If the conditions permit (raw material or semi-finished product), it is scribbled with quartz or crystal. If it is “water foam”, it is easy to move. If it is jade, it is difficult to move, and the hand feeling can be distinguished.

Five, measuring the refractive index

The refractive index of the water foam is 1.52~1.54, while the jadeite is 1.66. The refractive index of the water foam is relatively low, and its luster is weaker than the jadeite. In general, the emerald of the ice has a glass luster, while the water foam can also have a glass luster, but the luster is different from the emerald, and more is: waxy luster! (Note: This method of judging is only for the jadeite and water foam that have been polished.)

Sixth, structural comparison method

Among the various structural expressions of jade, the most common one is: "bean-like structure." “Bean” refers to the boundary between the crystal grains that make up the jadeite. When the grain boundaries are obvious, the phenomenon of “beans” appears. The structure of the water foam is also a granular structure, but it is often thinner. The appearance is that the water head is relatively long, that is, the transparency is relatively high. Therefore, you don't have to worry about the jade of the bean field being a water foam (at least the water foam of the bean land has not been seen yet).

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