Some of the natural Hetian jade stones are covered with skin, usually found in sugar, stone and color. So, what exactly are these three kinds of leathers? The small series of China Jewelry Merchants Network will explain to you below.
First, the sugar skin
It refers to a yellow-brown jade skin distributed on the surface of Hetian Yushan. The color is similar to sugar color, hence the name.
In general, the jade in the sugar skin is mostly sapphire and white jade. The thickness of the cortex is thick, ranging from a few centimeters to tens of centimeters, and they are in a transitional state with the internal jade.
Some people have studied the sugar jade saccharide skin and found that its production is caused by the oxidation of Hetian jade. That is to say, the sugar jade is a product of oxidation, and after the formation of jade, the ferrous oxide is converted into ferric oxide due to changes in the external environment, thereby impregnating the saccharide skin.
Second, stone skin
It refers to a layer of surrounding rock wrapped in the surface of Hetian jade seed jade.
Generally, there are two types of surrounding rock, one is the translucent petrochemical Baiyun marble and the other is the tremolite rock. Although the former is attached to the surface of jade, it has a clear boundary and is easy to separate. If the latter is a coarse tremolite, and the jade is not completely separated, the surface of jade will often have some rough tremolite.
Third, color skin
It refers to a layer of colored jade wrapped around Hetian jade seed jade, which can have different names depending on its color, such as black skin and deer skin.
From this kind of leather, you can see that the jade inside is good or bad, like the two kinds of leather mentioned in the previous paragraph, and the more white jade, if it is with skin color, the value is even higher.
This kind of jade skin, the skin is very thin, and the shape is also various. Therefore, in the Hetian jade carving, the color skin is often used to make the color, which adds luster to the jade.
After reading the above content, I believe that you have already got to know the three kinds of leathers, and you will be able to use them later in the purchase of Hetian jade.
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