Why does jadeite change color? Why does jadeite turn brown?

Emerald will change color, which may be caused by chemical reaction. Chromium in jade will react with human oil and sweat, leading to fading. It may also be that the structure has been seriously damaged, and the damage of the jade structure will make the jade lose water and lead to dim color.

Natural jade bracelets will not change color for a short time because of normal wear. What you encounter is probably the result of artificially optimizing the dyeing of jadeite, or the imitation of jadeite by other materials.

Do not pay attention to maintenance when wearing it. If you don't pay attention to maintenance, the jade bracelet will be hot and cold, and the expansion and contraction of the jade crystal will cause looseness, and the gap between the crystals will increase, which will weaken the transparency and fade, leading to the discoloration of the jade bracelet.

The color change of jadeite after wearing for a long time is mostly due to the variety, and the structure of this jadeite is also relatively loose. Some jadeites will turn yellow and get old after being worn for a long time, which is called varieties in the industry.

Iron oxide. Emerald contains Fe2 ++ ions, which are oxidized to Fe3 ++ and a series of iron oxide minerals under surface oxidation conditions. The yellow of jadeite is yellow and tan. Under normal circumstances, discoloration is at normal temperature and pressure.

There are many reasons for the discoloration of jade bracelets, which need to be judged according to the actual situation, such as variety, strong acid soaking, dyeing treatment and so on.