Recently, several jade lovers have consulted the same question, that is, jade turns yellow after wearing for a long time, and they are worried whether they have bought dyed jade.

In fact, there are many reasons why jade turns yellow. Let’s analyze them for you:

When the color of jade changes after being worn for a period of time, it is called a "variant" of jade color. This does exist in some low- and mid-grade jades costing a few hundred or a few thousand yuan.

From left to right, as the degree of oxidation deepens, the color of the jade bracelet gradually changes from dark green to yellow.

Jade is composed of a variety of minerals (such as jadeite, chrome pyroxene, nanochrome pyroxene, etc.) that are aggregated under high pressure deep in the earth's crust. The smaller these mineral particles are, the denser the structure of jade, and the older the "seed" of jade. On the contrary, the coarser the mineral particles and the looser the structure, the younger the "seed" of jade.

Generally speaking, jadeite with a tender texture (not fine enough in structure) is prone to "mutation" . For example, oily green jadeite and some violet jadeite with poor texture are more likely to "mutate".

Jadeite raw stone that has been oxidized to form a yellow jadeite outer ring

The reason for the jade itself

On the surface of secondary green jadeite products, some silk-like yellow "rust threads" will appear over time. If the "rust threads" are concentrated on the surface, the original oily green areas will gradually turn yellow, or even turn yellow .

Yellow "rust" appears on the bracelet surface due to oxidation

Oxidation inside the violet jade causes it to fade and turn yellow . On the surface of violet jadeite with coarse crystal grains and loose structure, since it is more susceptible to oxidation, the trace Fe2+ contained in the jadeite minerals will gradually oxidize and transform into Fe3+, causing the violet color to gradually change to yellow.

Violet jade with larger crystal grains

Human Factors

Yellowing of the surface is caused by human oil, sweat and oxidation.

When people touch jade with their hands for a long time, the body's sweat and oil will penetrate into the surface of the jade. As time goes by, the sweat and oil will gradually oxidize and turn yellow, resulting in yellowing on the surface of the jade.

The Buddha's eyebrows, nose and other protruding parts are stained by human sweat and oil, causing yellowing.

Of course, the yellowing jade cannot be ruled out as B or C grade jade that has been acid-washed, drifted, and dyed. After long-term wear, various artificial additives will fade, revealing the original appearance of the jade. The one on the left is unbleached jadeite, with dark impurities visible inside and poor transparency. The jade on the right has been bleached, which has increased its transparency and made the interior much purer.

From this perspective, to avoid jade "mutations", purchasing high-quality jade is a good way to reduce the possibility of jade itself "mutating". At the same time, you should also pay more attention to daily maintenance.

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