How to tell the true and false jadeite?

This is to see the truth. This is a relatively simple method to identify true and false!

1; I just put jade on my face and felt very cold. If it doesn't get cold for two or three seconds, it means it's true. Because jadeite can transfer heat and dissipate heat quickly! If it is not cold on the face, it is fake.

2; That is, the magnifying glass should be 10 or 30 times to look at the crystals inside to see if there are any small cracks like cobwebs, and whether the color is on the cracks or on the jade surface. If there is, it is fake. Hetian jade looks like rice paste, because the crystal is fine and the color is even. Jade looks like the wings of a fly, some like a little ofloxacin, and some like broken glass. Because the jadeite crystal is not delicate enough, there are many colors on the same jadeite.

3; It's an appraisal of destruction. Set it on fire. It's just burnt black, burnt yellow and stinky. Black and yellow are fake if they are not washed off. It's burnt and smelly. That's even more fake. (If the fire really comes, there will be small water droplets attached to the jade, but if it is fake, there will be no small water droplets attached to the jade.)

How to tell the true and false colors of jadeite?

① The hue of jadeite can be roughly divided into the following six types.

1, white, basically contains no other impurity elements.

2, red, containing chemical element iron.

3, green, containing more than 2% chromium.

4, black, containing more than 2% chromium and iron.

5, yellow, containing tantalum.

6, purple, containing chromium, iron, cobalt elements.

As can be seen from the above, jadeite contains elements needed by human body, and different jadeite colors contain different elements. Therefore, the real jade is very beneficial to the human body, so be very cautious when choosing to buy jade products.

(2) The jadeites popular in the market at present are divided into the following four categories according to the grade of authenticity:

Grade A goods are not only natural in texture, but also natural in color. Identification methods mainly focus on the following three points.

(1) Look before you leap. Because of the relationship between mineral resources and exploitation and the specific situation of people's large demand. At present, there are few good jadeite jade on the market. In particular, there are few varieties with green color and bright ground color.

(2) Generally, varieties such as Mabel Miao, spinach green, scarlet or violet floating flowers are common.

(3) Observed by naked eyes under the light, the texture is delicate, the color is soft and the stone lines are obvious; Slight impact, crisp and pleasant voice; Holding it in your hand has a heavy feeling, which is obviously different from other parts of the stone.

For grade B jadeite, commonly known as "dirty" jadeite with black spots, it is immersed in strong acid for corrosion to remove "dirty" and "cotton" to increase transparency, and then epoxy resin or substitute filler is injected into the microcracks caused by strong acid corrosion with high pressure to fill and consolidate the cracks.

(1) The color of B goods was good at first. If you look closely, the color will become evil. If you look at it under a lamp, the color transparency will be weakened.

(2) Within two years, B goods gradually lost their luster, were full of cracks and became ugly. This is caused by the strong acid destroying its original quality.

(3) The density is reduced and the weight is reduced. Slight impact, low voice, lost the crisp sound of a cargo.

Class c goods, completely artificially colored. ?

(1) At first glance, the color is not right and evil.

(2) Looking closely under the lamp, the color does not naturally exist in jadeite crystals, but is filled in the cracks of minerals, showing a network distribution of colorless roots.

(3) Observing with Charles filter, the green color becomes red or colorless.

(4) The surface color can be removed by scrubbing with powerful decoloring agent or turned brown.

D goods, D goods pretending to be jade ornaments mainly have the following two categories.

(1) jade. That is, other jadeites pretend to be jadeites. There are mainly Thai jadeite and Malaysian jadeite, Nanyang dushan jade, Qinghai jadeite, Miyu, Australian jadeite and Dongling stone. The difference between jadeite and jadeite is: first, the hardness is low; Second, low density (light weight) and weak luster.

(2) Green glass and green plastic. Most of these substitutes are dull and ugly, and their luster is very weak. The relative density is very light, the hardness is low (it can be carved with nails), and there is no cold feeling.

How to distinguish the true and false jadeite by the simplest method?

Identification of jadeite jade can be divided into (1), modeling identification (2), jade quality and jade material identification (3), decoration identification (4) and style identification. The identification of Qin color focuses on learning and understanding the color change between ancient jade and objects that have been in contact with various storage environments for a long time, but it is actually a physical phenomenon, and the natural quality change it produces is color change. We usually call it "Qin color". For example, ancient jade stored in red paint may be red, black paint may produce black, and buried in loess may produce yellowish brown mud. Observing under strong white light, Qin color usually occurs in the place where jade contact is weak or naturally cleavage wrinkles. Then along the cleavage or fissure, the penetration expands, which can seriously soak the whole organ, which is called "total immersion". After playing, the color is bright, and the color of the piano mostly changes from gray to red. The important point is: under normal circumstances, genuine products are relatively simple; The darker the color, the more chaotic the piano color and the bright piano color are questionable. Even if the real jade has cleavage and cracks, it is not a contact part and does not necessarily have bright colors. Imitate the color of the piano by chemical or physical methods, usually the whole piano. There is also local soft mud, which is characterized by its Qin color. It is not necessary to burn pseudo-ooze in the soft rib or crack of jade. This can be observed under intense white light. However, it is useful to forge the Qin color by laser along the cleavage or fold of jade with high technology. Another point is that the storage environment of jade is dry or jade is dense. Look at the color: natural jadeite has natural color, uneven distribution, prolonged green trend and generally no fluorescence. Look at the polished surface: the polished surface of natural jadeite is fine and smooth, with grease showing a strong glass luster. If you look closely at the polished surface, you can usually see the mottled crystal interwoven structure. In general, the variegated crystal particles of the same jadeite are uniform in size; At the same time, slightly transparent to opaque white fibrous crystals can be seen, commonly known as "stone flowers". Listen to the sound: tap the natural jade gently, making a crisp and pleasant sound. If it is artificially processed, it will make a dull sound. In addition, because of the high density of jadeite, it feels like a thug by hand; Jade has a strong water-holding ability. When it drops on it, the water drops protrude higher. At the same time, some experts remind consumers that when buying high-priced jewelry and jade, they should choose regular and well-known jewelry stores or large and reputable shopping malls. Also remember to ask the merchant for the jewelry and jade appraisal certificate with the "CMA" logo. Usually, every precious piece of jewelry and jade has a certificate to ensure that the purchased jewelry and jade are consistent with the certificate, and the certificate is accompanied by photos. First-class jade, moist, thorough and greasy, is moist in your hand. The main method to identify the authenticity is to use a magnifying glass or microscope to see that there is a fiber interwoven structure inside the jade, and the particles are fine; Artificial glass has no structure and bubbles can be seen. You can also carve it in an inconspicuous place with a knife. What can be carved must be fake jade, but what cannot be carved is real jade. As the saying goes, "Gold is valuable, but jade is priceless". Because the top grade Hetian jade is getting scarce, it can reach tens of thousands to hundreds of thousands of yuan per kilogram, while the average Qinghai white jade and Russian white jade are only a few thousand yuan per kilogram, so some people mix it with Hetian jade. The minerals of these jadeites are basically the same as Hetian jade, but the surface color is dark and not soft, which will be even dimmer after a long time. Old jade and new jade can be distinguished from two aspects. There is an oxidized jade skin on the surface of the old jade, commonly known as "patina", which is similar to the skin of autumn pear and obviously different from the natural color of jade, while the new jade does not. Judging from the theme of sculpture, ancient jade is a symbol of rank and power, and there are many mythical flowers, birds and figures, such as dragons and phoenixes. New ones are generally auspicious themes. Jade has been closely related to China culture since ancient times. People's interest in jade is not only that it is a crystal clear, colorful and pleasing ornament, because jade has wealth effect, is hard currency and has great appreciation potential. In gemmology, people divide it into two categories: jadeite and jade in a narrow sense. There are only two kinds of jade, jadeite (also called jadeite) and nephrite, which are divided into white jade, white jade, jasper and jet according to different colors. Others, such as agate, pith, jadeite, turquoise and lapis lazuli, belong to general jade. Most importantly, there are three levels of identification problems in purchasing jadeite and nephrite. Whether it is real jade or nephrite, you should know that there are a lot of imitations that look like jade and nephrite on the market now. Some are completely different from jadeite and nephrite in material composition, but there are some similar natural substitutes in appearance, such as Australian jade, albite jade (commonly known as water foam) and Wulan Cuimayu. It can be used for Jing Baiyu and Ah Fu to pretend to be white jade. ......

How to identify the authenticity of jadeite?

Distinguish between true and false jadeite: first, first, look at the light obliquely to see if there are any holes on the surface that are naturally irradiated. If there is, it's really smooth. Second, drop a drop of water on the jade surface with a toothpick. If it is true, it will hang on it like dew, not fake. Be sure to clean the jade before inspection. Third, look at the hardness. Rub the jade hard on a piece of glass, and then see if the jade is worn. If you do, it's probably fake.

How to tell the true and false jade beads

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How to identify the authenticity of jade pendant

There are star-shaped, linear and flaky flashes on the surface of jadeite. The color of jadeite is rich and colorful, which is not found in other gems, so we should not only look at the color and tone, but also pay attention to the combination and distribution of colors. The luster of jade is glass luster, greasy luster or greasy glass luster. Jade with good transparent water head is thoroughly hydrated, which is not available in other jadeites. Put the smooth surface of jade on your face or lips to feel cool. Simple identification method: 1. Looking at the sunshine, there are some foggy things in jade, like cotton wool. 2. Jade is very hard, like a diamond, so you can draw a series of marks on the glass. Generally, the hardness of small steel knives is about 5.5. Poke the jade hard and you can see the imitation and the fake at a glance. It's cold to stick jade on your face. It is true that it is not cold after two or three seconds. Because jadeite can transfer heat and dissipate heat quickly! If it is not cold on the face, it is fake. 4. Take a magnifying glass of 10 or 30 times to see if there are any small cracks like cobwebs, and whether the color is on the cracks or on the jade surface. If there is, it is fake. Jade looks like the wings of a fly, some like a little ofloxacin, and some like broken glass. Because the jadeite crystal is not delicate enough, there are many colors on the same jadeite. 5, destructive identification, fire. It's just burnt black, burnt yellow and stinky. Black and yellow are fake if they are not washed off. It's burnt and smelly. That's even more fake. Really, when the fire comes, there will be small water droplets attached to the jade surface, which will burn black and return to its original color after washing. But we generally don't use this method, which is not good for jade.

What is A goods? How to tell the true and false jadeite?

A goods refer to natural jadeite that has not been treated by artificial chemistry or laser, but has been carved and polished. It's not a hierarchical title for jadeite. A goods may not be very good, but they must be all natural.

If you are a businessman, it won't be too wrong to judge the truth by experience; If you don't know much about it, Yuling Jewelry recommends that you go to a professional appraisal agency for appraisal. Non-A grade jadeite general institutions will be very cautious when issuing certificates, because they are responsible for the appraisal results, so the price is higher. Most of the appraisal methods that have been circulated have no scientific basis, and we don't support them.

For example: hair is close to jade and burns continuously with a lighter, but in reality, even if hair is placed close to glass, it will burn continuously;

For example, real jadeite should be cool, but the reality is that jadeite has high density and high specific heat (which experts can see). Refrigeration and heating are only a matter of time and environment;

For example, it is scientific to look at the texture of jadeite, but not all jadeites have visible texture;

For example, this method has certain scientific reasons, and the density of jadeite is relatively large;

Another example: look at whether the color is natural, the color of natural jade is natural, and the degree of color fusion of artificial treatment is unnatural;

If you don't understand it very well, the method with a little scientific basis is only a relative basis and is not necessary.

How to tell the true and false jadeite?

1. True jadeite: It should be natural jadeite, and the following conditions must be met: (1) Its mineral composition is mainly natural jadeite and pyroxene; The chemical composition of jadeite jade is NaAISi2O6. And may contain iron and chromium. (2) Its color is naturally formed. (3) Its structure and construction remain in a natural state. (4) No external substances are added. This kind of jadeite is called "A" by experts. 2. Fake jadeite: The appearance color and transparency of fake jadeite may be similar to that of jadeite, but its material composition is not jadeite and sodalite, but other natural minerals, such as dyed quartzite and chrysotile. It could be artificial glass or something. 3. A part of fake jadeite-artificially treated jadeite: its mineral composition is the body of natural jadeite, that is, its jadeite itself is true (natural), but its color structure has undergone different artificial treatments, which can be divided into: (1) dyed jadeite: jadeite has the same physical properties as natural jadeite, but its color is not naturally formed, but artificially dyed. This kind of jadeite is called C by experts. (2) Resin-filled jadeite after pickling: natural jadeite, which is decontaminated with strong acid and then filled with resin. Jade itself is a natural jade, which retains the primary color and removes the secondary color, and its structure is destroyed. Due to the addition of resin, its transparency has increased. At first glance, it looks beautiful because of its bright colors, but on closer inspection, it shows a waxy luster. This kind of jadeite is called B by experts. (3) Film-wrapped jadeite: natural colorless or light-colored jadeite, which is wrapped with bright green plastic film, showing bright green, and the surface green is purely an illusion. (4) Sandwich jadeite: natural colorless or light jadeite with good transparency. In order to forge false colors, the exposed ring surface is divided into two halves along the solitary surface, and then bright green plastic is sandwiched in the middle and put together to make the jade ring surface appear bright green. Identification method of goods B: By measuring the gem properties of bleached and glued jadeite, there is no significant difference between them and untreated jadeite in refractive index and spectrum (hand-held spectrometer), but there are significant differences in specific gravity, ultraviolet fluorescence reaction, hot needle reaction test and high magnification characteristics (appearance), which can be used to test bleached and glued jadeite products. Recently, a new instrument infrared spectrometer for jewelry identification is developed, which is expensive and requires high technology. But the most accurate thing is this: (1) Drop a small drop of pure hydrochloric acid on the original jade and observe it for a few minutes (about 1-20 minutes), and there will be many beads of sweat around the drop. This reaction is the interaction between crystal particles of jadeite and small cracks, sub-pores and capillaries. When using the same method to test bleached jadeite injected with glue, there is no such phenomenon (small round sweat) because the glue fills the sub-pores. Note that in dry and hot places, especially in air-conditioned rooms, hydrochloric acid will evaporate before you see the reaction, so be sure to keep dripping hydrochloric acid. (2) With the help of the reflected light of the microscope, it can be observed that the filler reaches the surface crack. Low-grade jade with poor luster may also find white spots on jade pieces; Due to negligence in handling; In the sample of polished surface, sometimes we can see the bubbles of filler or the polymer of cotton wool fiber gathered in the transparent glue, and occasionally we can see the glue residue in the carved shallow grooves, depressions and pits. (3) Ultraviolet fluorescence reaction, most natural untreated jadeites have no reaction to ultraviolet radiation. Under long-wave ultraviolet radiation, some parts are white with light to moderate yellow, but they are weak or unresponsive to short-wave ultraviolet radiation. The green part didn't respond. However, the bleached and glued jadeite has a fluorescent reaction to long-wave ultraviolet rays. However, under short-wave ultraviolet irradiation, the response is slow or unresponsive. Generally, it shows weak blue-white fluorescence under long-wave ultraviolet light, and sometimes it is more obvious in white places, which is roughly from the injected rubber. Therefore, it shows blue-white to yellow-green fluorescence under long-wave ultraviolet, which provides a useful index for the bleaching of rubber-injected jadeite. However, this test must be carried out in a dark room. If it is in a bright place, you can't see the fluorescence, and the fluorescence reaction of the gem is mostly for reference, so it must be determined by other methods. Of course, there are many high-grade B goods now, and this issue may be invalid. (4) Knock: to distinguish the quality and grade of jadeite, there are six words in the old saying: color, transparency, uniformity, shape, knock and shine, which have always been the motto of the jade industry, among which "knock" is more useful in identifying B goods. Large items, such as jade bracelets, are tapped with coins. If it is natural and untreated high-grade goods, it will make a crisp and pleasant sound, and B goods will make a dull sound. Its theoretical basis is that the rubber compound or crack in the jadeite structure blocks the sound wave, while the untreated sound wave vibration is not hindered. (5) infrared spectrometer ......

How to distinguish between true and false jadeite

The easiest way to identify jadeite:

(1) Look at the certificate.

At present, there are many gemstone certificates in China, the most at the provincial level and the most at the national level. Many people can't read the certificate, so I will teach you the simplest way to read the jade certificate: there is a phone behind the certificate, call it directly, and the receptionist will ask you to tell him the certificate number, and then she will tell you all the information about the jade jewelry you bought! If you buy jade and the certificate is diamond, then you take medicine! Maybe the jade jewelry you bought is a pendant, but the certificate is a bracelet, or the weight of jade is wrong. These situations may be that you bought a fake!

(2) Look at the brand.

Real big brand stores may have almost no fake jade! The third is to look at the color of jade. This move may be a bit difficult for beginners. Natural jade color is in the structure of jewelry, and fakes or B.C goods are pressed into or into the jade structure. The color transition is unnatural, just like China's landscape painting. The real jade color transition is very simple! Which is what we call the color root!

(4) Look at the structure of jadeite.

No matter what kind of gem will have its own unique structure, the structure of jadeite is the composition form of jadeite mineral particles. The better the composition of jadeite, the more detailed and dense it is, the less obvious the composition structure, and the worse the quality, the easier it is to see! Commodities b and c are not made up of this structure. D goods are pure fake jadeite, and the original stones or jadeites of B and C are only artificially made, which is more interesting! You can also use jade jewelry to scrape the glass to test the hardness!

(5) Listen to the voice of jade.

Hang jade jewelry with a thread, and then tap it gently with a metal bar (remember to tap it gently). If the sound is crisp and not boring, it is the real thing! The longer the sound, the better the quality!

Finally, what I want to say is, don't be careless when buying jade now. What kind of goods and what price, cheap goods are not good, this is the eternal truth! If you are still not confident, you can go to the local quality inspection bureau for a test or redo a certificate!

Please adopt!