Jade is generally a silicide of calcium, magnesium, aluminum and iron. Generally, the reasons for yellowing are as follows:
1. Fake goods, commonly known as B goods, are exposed to the moisture in the air or the sweat on the body, and the oxidation reaction occurs, gradually turning yellow or turning brownish black.
2, is the real thing, but it has been cleaned by the acidic syrup, and then reflected with the chemical composition of the body sweat, it becomes yellowish, but the color will not be very deep. If it is deep, it is recommended not to wear it. This may be The time of invading is too long.
3, the same is the real goods, but after the artificial color change treatment, the jade becomes crystal clear through the radiation method, this non-professional institution can not detect, but at the same time it will change the chemical composition of jade, resulting in the jade wearing time is long. Discoloration occurs afterwards. Usually, the jade that has been modified by radiation is very harmful to the human body. It is recommended not to wear it.
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