Can anyone tell me how to easily distinguish A, B, and C jadeite?

1. Identification of jadeite A goods B goods C goods can be measured by measuring the density of jadeite to identify the quality of jadeite hail level. In general, the density of Jakai jadeite is in the range of [25-43]. The jadeite density of A jadeite is low, and the jadeite density is higher than 33 belongs to B jadeite, while the density of C goods is higher than 43.

2. Jadeite B+C goods: Naturally, it refers to the synthesis of B jadeite and C jadeite, that is to say, it has undergone strong acid erosion like B jadeite, and has been dyed like C jadeite. B+C jadeite looks beautiful both in color and in head.

3. Under normal circumstances, the sound of A jadeite is crisp, long and echoy, and metallic, and the sound of B jadeite is dull and hoarse.

There are many classifications of jadeite, and when buying, you often hear people say that a goods are divided into b goods and c goods, so what does a, b, and c goods mean? On what basis? Does it mean that jadeite A goods are of the best quality and C goods are of the worst quality?

A goods A goods that are pure natural jadeite, only after the traditional process of surface acid or wax treatment, its jadeite is corroded and damaged by the structure, jadeite, strong surface reflection, glass luster, natural color, layering, uneven transparency, colored parts are relatively transparent, green into mineral spots and strips distribution, a goods jadeite when the sound is crisp when striking each other, like a metal sound echo. The characteristic of A goods is that the color distribution is uneven, and there are colored roots in the colored places. In the words of the industry, it is called "dragons have water everywhere".

To put it simply, colored areas are more transparent. If a jadeite is very uniform and uniform in color and transparency in your hand, then you have to pay more attention, it is very likely that it is B or C goods.

B jadeite B goods are jadeite products that are loosely structured but still have some market value and are artificially synthesized through pickling, glue injection and other processes. The surface is yellowish, there is no spirituality, or the color is too bright. Under the microscope, the goods have acid etching lines like spider webs.

The ultraviolet lamp has strong fluorescence, which is called B jadeite. The principle of B jadeite is that the structure of jadeite itself is very loose, and the cracks will open after soaking in strong acid, and the impurities of cheap jadeite will be removed after opening. In addition, artificial additives, such as epoxy resin, and other synthetic substances that are artificially added to plastic.

The whole gathering will look clean, but there will be no spirituality, and this kind of person we call it bgoods.

What is C goods? Regardless of whether the C goods are bleached or not, whether there is injection molding or not, as long as it is artificially colored, we are collectively referred to as C goods. The transparency of artificial coloring will be very uniform, and the color is also layered, very unnatural, without color roots, and the color will gradually fade under strong light.

This kind of person we call it c-cargo jadeite.

ABC Comparison.

Through our introduction, I believe that many cui friends have a general understanding of jadeite a, b, c goods, but in real life, in the face of the endless emergence of fake jadeite, I hope you can keep your eyes open when buying, do not buy fakes.

Jadeite refers to the pure natural jadeite that has not been artificially treated by physical or chemical means and methods to cause damage to its internal structure.

B goods refer to the use of strong acid soaking and bleaching, so that the internal structure of jadeite has been seriously damaged, must be injected with a large amount of polymer to consolidate before it can be used, the identification certificate indicates "treatment".

B goods have no glue B goods. Glue filled B goods.

The C goods of jadeite refer to dyed jadeite. Regardless of whether it is pickled and bleached, whether it is filled with glue or not, artificially colored jadeite is called C goods.

A simple identification method for jadeite A, B, and C goods.

The jadeite is placed under ultraviolet fluorescent light and its color change is observed, and the A and C goods do not change, and the B goods are fluorescent and white. C goods are dyed, so their color is distributed along the cracks, and the distribution is uneven, which can be seen by careful observation by the naked eye.

"Color: A natural jadeite is natural in color, unevenly distributed, and the green trend is extended. B goods at the beginning of the color is good, carefully observed, the color is evil, under the lamp observation, color transparency weakened.

Under ultraviolet lamp, B goods jadeite has a blue-white fluorescence reaction. And natural jadeite is not available. The color of C goods is too bright, not right, and there is no soft nature of natural jadeite.

There is no concept of A, B, and C goods in the world, but after the 80s of the last century, some unscrupulous businessmen used non-physical methods to deal with low-grade jadeite in order to make huge profits, so there was a distinction between A, B, and C goods.

As the saying goes, jadeite refers to natural jadeite, that is, jadeite produced by nature that has only been processed and polished normally. People have higher and higher requirements for the quality of jadeite. After all, the colorful jadeite produced by nature is rare and expensive; There are not many good color varieties that are slightly worse, and most of them are color difference, coarse seeds, and waterless.

The contradiction between this market demand and the small output of high-quality jadeite is becoming increasingly acute, and many merchants try to improve or change the color and transparency of jadeite through artificial optimization of those poor quality jadeite, so B, C and B+C. were born

A goods: without any artificial chemical treatment. It is pure natural jadeite. The structure of its jadeite has not been corroded or damaged. It is also a jadeite bracelet, but in comparison, the ** of jadeite A bracelet is many times higher than that of B bracelet and C bracelet.

B goods: just pickling, bleaching, glue potting, no colored jadeite. The appearance of the water head is very good, indicating that the gloss is gelatinous, and the percussion sound is muffled, and the ** is relatively low.

But the value of good B goods is higher than that of bad A goods (don't think that A goods are necessarily very valuable, and there are also worthless brick A goods). B goods made with the latest technology are very close to A goods.

C goods: generally refers to artificial dyeing, mostly directly immersed in the dye for long-term heating and dyeing, sometimes need to be heated repeatedly. Note that since you want to dye it, you must artificially destroy the structure of the jadeite, otherwise the dye will not be able to enter the inside. But this destruction is not necessarily pickling.

B+C goods: both pickling, bleaching, glue filling, and artificial dyeing, both the color and the head are very beautiful, as a cheap and high-quality jewelry, but there is no collection value.

What is a cargo? B goods? C goods? D goods?

A goods: It is only mechanical carving and polishing, without any other artificial chemical treatment of natural jadeite.

B goods: After removing the impurities in the jadeite by chemical methods, it is then filled with glue, also called glue injection.

C goods: B goods (before glue injection) + artificial dyeing, and then glue injection.

D goods: Passing off something that is not jadeite as jadeite.

How to tell the difference? It is divided into two categories: empirical judgment and technical appraisal.

Empirical judgment: mainly the elimination method, that is, not B, C, D goods, or A goods, very experienced people, can identify 80% of fakes, including BCD, but some high imitation, indeed some difficulties, inexperienced, almost difficult to do, experience acquisition is a difficult thing, requires a lot of energy investment, long-term accumulation and appropriate capital investment.

Technical appraisal: The technical appraisal of jadeite, which is a method with a high discrimination rate, is a relatively fair method, and several issues that need to be paid attention to are:

The technical appraisal certificate of a qualified institution is the basis for judging legal disputes, but empirical judgment is not.

Authentication certificates can also be faked, so learn how to identify fake certificates.

Some old jadeite has slurry, in the technical identification, because of the existence of pulp, there may be some problems in some technical indicators, need to pay attention.

One look, two listens. If you don't know how to look, you can recognize it by listening. The jade and jade gently hit and make a pleasant sound, which is a first-class A goods. Otherwise, what is heard is a muffled sound. Just compare and understand.

To put it simply, it is a pure natural B that has been artificially modified or added with color C and is synthesized with powder or other non-jade substances.

A goods are pure natural, B goods are colored, and C goods are not green.

The treatment of B and C goods jadeite can generally be easily identified: the color is too beautiful, even evil, and the water head is too transparent, but it is different from A goods, the water head of B goods is more ambiguous, with a gel feeling, observe the surface with a magnifying glass, there are very obvious pieces of continuous network acid etching lines, pay attention to the small pits that are not polished well with A goods. B goods feel lighter, the impact sound is muffled, not clear.

The hardness of jadeite of various colors is different, the particle structure is not the same, some kinds of jadeite with fine hardness can throw out a good glass light, even so, with a magnifying glass, you can also see that the bright surface is still some independent pits, and there will be more small pits if you are slightly thicker, but this kind of small pits caused by the characteristics of the tissue structure itself are independent of each other, for example, there are fewer pits on the left side of the two pieces of jade, and there are more pits on the surface of the two pictures on the right, which is also the natural characteristics of natural jadeite, which is a normal phenomenon.

<>1. Texture Distinguish the texture of A and B jadeite, the texture of A jadeite is very pure, there are fewer flaws inside, and the overall look is crystal clear. Although the texture of B jadeite looks more transparent, it has low hardness and is easily damaged.

2. Appearance Distinguish A goods and B goods jadeite can look at the appearance, use a high-powered magnifying glass to view Li Shishan to observe the surface of jadeite, a goods jadeite surface has a bumpy condition similar to orange peel. Because of the pickling process, the surface of the jadeite will have cracks on the surface.

3. Color Identification of A goods and B goods jadeite can be seen in the color, A goods jadeite because it has not undergone chemical treatment, so the color grading effect is better, and there is an obvious dividing line shape. The color of the jadeite is uniform and single, and the shape of the dividing line on the surface is relatively blurred.

1. Usually to see whether jadeite is A goods or B goods can be observed by observing the surface of jadeite, observing the color of jadeite and looking at the dividing line of jadeite.

2. The category of jadeite A goods is jadeite that has not undergone any artificial treatment except for cutting and polishing, also known as natural jadeite; The jadeite B goods are pickled and glued jadeite, which is very different from the jadeite A goods.