Detailed identification method of C-grade jadeite

Talking about C-grade jadeite can be said to be a "commonplace" topic. Today Mingyue shares this article with you, which provides the latest and most effective graphic tutorial for the identification of C-grade jadeite. To be honest, the counterfeiting and selling of fake jade happens every day, and the technologies and techniques are constantly updated. Therefore, preparing and accumulating more similar knowledge is a very important good habit in playing with jade!

C goods, Color, means dyed. Supplement: B goods, Bath, originally means to rinse, here it refers to acid washing. (Some people actually found this funny...)

One method is to just dye it, using colored dyes to directly fill the cracks in the jade. This is pure C-goods.

Another method is to pickle first, then dye, and then inject glue. Or inject colored glue directly! It is what we often call B+C goods.

There is no need to explain the B+C process, in fact, the process is the same.

Since it is dyed, the dye has seeped into the cracks. The color only exists in the cracks, so it looks scattered and floating. As shown below, the dye is only present in the cracks. In other words, if the structure is dense, it is more difficult to dye. This is why only the loose structure is dyed, that is, the difference in structure.

If it is B+C, it has been corroded. There are definitely acid etching marks on the surface. Because the cracks are made larger after being corroded by strong acid, more glue can be injected, so the structure has been changed and cannot be removed by polishing. If you scratch the surface with your fingers, you will feel resistance (don’t worry about damaging the jade with your fingernails, the hardness of jade is 7 and the hardness of fingernails is 3).

Let’s look at a few examples. The following pictures are all B+C. The luster is weak, the color is dispersed, and it looks like a network if you look closely.

The one below is also B+C. The gloss is dark and the color is very scattered. This kind of thing is also very confusing because it is dyed very green, which looks very fake. It seems to be there and not there, and seems to have a little base color. Generally, people will not be very suspicious. Moreover, such small items are not expensive and very tempting! ! ! As consumers’ ability to distinguish improves, B+C is also developing towards the mid- and low-end and small items. Come to think of it, consumers who buy goods worth tens of thousands of dollars will surely learn a little about identification before making a purchase. And how many people have the patience to learn after buying something that costs several hundred dollars? I thought it was just a casual play and it would only cost a few hundred dollars, but I didn't realize that this kind of thing actually only cost a few dozen dollars.

The one below is a C-grade product with a slightly dyed surface, which is very deceptive. You have to use a magnifying glass.

More than ten years ago, a large number of C-goods as shown in the picture below flooded the market! Due to the limited number of testing agencies at the time, it was troublesome and costly to issue certificates. In addition, customers knew very little, so when they saw that it was green, beautiful, and cheap, they bought it immediately! ! ! Nowadays, friends often send me the jadeite they bought more than ten years ago and ask Uncle Shi to identify it. At first glance, it turns out to be B-grade or C-grade jadeite. . .

Nowadays, dyed silk will not be this emerald green color because it looks too fake. . . The most lethal ones are those that have a high green color and are then injected with glue and dyed. This kind of specimen is hard to find. . There is no picture. . . It is similar to high green injection, but it is dyed again, so the color looks better. It requires some experience to judge.

Basically, you can tell the difference by looking at the gloss, scratching it with your fingers, and looking at the color.

You need to use a magnifying glass. In addition to the slight staining mentioned above, there is also a kind of staining called polishing powder. Directly on the picture, dyed with purple polishing powder. . . .

It is common in Myanmar that after the bracelets are made, the owners will prepare the certificates and then apply a layer of colored polishing powder. It is very confusing and hard to detect with the naked eye, so why choose purple? Because most purples are relatively light and appear to be almost non-existent. The polishing process does require polishing powder, and there will indeed be a little bit of residue, but that is colorless polishing powder, and if the quantity is large, it will be reflected in the certificate, with words such as polishing powder and polishing powder residue visible on the surface.

After returning from Ruili, Myanmar, I took a few photos of polished powder-dyed violet bracelets to share with you. These must have been processed in Myanmar (you can tell from the shape of the bracelet, and polishing powder dyeing is not done in China). Why violets specifically? Because the color of violet is usually lighter, with a vague base color.

The real jade violet are those shown in the picture above. At least the "purple" color can be clearly seen in the picture. From experience, the value of this batch of bracelets will not be low! As you can imagine, if this is really the case, how likely is it that those so-called "violet jadeite" with rich colors are the "real thing"?

There is another dyeing method that is also mentioned, called zha color, which is to heat the jade and then put it into a colored dye solution. It is the same with the dye in the cracks. No matter how many methods are used, the essence cannot be changed, and the distribution of the dye cannot be changed.

Another one is related to color, but it cannot be called C goods because it is not dyed. It is processed. The red color in red jadeite may also be roasted. This is not dyeing, but high temperature decomposing the hydrated molecules in the mineral. The red jadeite will be redder and of course drier. Look at the picture below. The one on the left is burnt red, bright but dry, while the one on the right is natural red jadeite, moist.

Since we are talking about this picture, let me say a few more words. Looking at the picture above, the red jadeite and yellow jadeite raw stones, the colors of the red jadeite and yellow jadeite must be distributed on the surface of the raw stone. If there are no cracks, it is impossible to enter the interior. Although it is burned red, it can also represent the color distribution of red jadeite, so when you see a red jadeite bracelet like the one below, you can tell at first glance that it is dyed and there is a problem with the color distribution.

Summary: No matter how it is dyed, these dyes will exist in the cracks and are not the original color of the jade, so the color will be different from the original color. . As long as you observe carefully, you will find that there is a problem with the color, it is scattered, floating, and silk-mesh-like.

In fact, if you compare the pictures in the article, you will find that the biggest shortcoming of C-grade jade is its color, and the most deceptive thing about C-grade jade is also its color. So Mingyue has long been saying that when you see a very gorgeous jade, you must be prepared to be "cheated" or "fooled". This is especially important for jade novices. Beauty is not the eternal theme of jade. The beauty revealed in nature is the beauty of jade. With the background of jade culture, it can be considered an exquisite jade article!

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