oxidate
The structure of Hetian jade is relatively stable and generally will not change. However, some jade will contain trace amounts of iron, which will oxidize and turn yellow after a long time.
Improper maintenance
Oils and stains secreted by human body stick to Hetian jade during playing. Once it is not cleaned for a long time, it will slowly penetrate into it and may turn yellow or even black. You must play this game in the right way.
Emerald yellow variety
If the variety of jadeite is not old enough, it is easy to mutate. What is a variant? Because the structure of too tender jadeite is not tight enough, the water inside slowly loses and turns yellow.
From left to right, with the deepening of oxidation, the color of jade bracelet gradually turns yellow from dark green.
dirty
Light-colored jadeite seems to turn yellow if it is stained with too much oil. In this case, only need to clean, can make the jade appear moist again.
The protruding parts of the Buddha's eyebrows, nose, etc. Contaminated by human sweat and grease, it turns yellow.
B huo c huo emerald
After pickling and glue injection, the jadeites of B and C goods have been worn for a long time, and the wax on the surface has disappeared, and the glue injection has fallen off, revealing the original dark yellow appearance.
Yellow pearl
Although pearls are beautiful, they can't stand the vicissitudes of time like people and will turn yellow. The chemical stability of pearls is poor. If they are exposed to air for a long time, the nacre will turn from white to yellow after being oxidized.