How to identify the authenticity of jadeite, you must know

Jadeite is also known as Burmese jade. It was once popular in the late Qing Dynasty and early Republic of my country. Because Burmese jade has high hardness, good texture, strong toughness, smooth and bright base, and good jade has bright and peaceful color, it has high value preservation and collection value, so it is called the "King of Jade". It is loved by many people who love and wear jade. There is a lot of knowledge involved in choosing the best Burmese jadeite. Whether in terms of Myanmar's mineral reserves or mining volume, good jade is very limited. The types of Burmese jade that are currently popular in the market are divided into grades based on their authenticity. There are mainly four categories. How to identify the authenticity of jadeite, you must know

A-grade products: The product has both natural texture and natural color. Among them, the seedling green, spinach green, jade or violet flower varieties are more common. When observed with the naked eye under the light, they have fine texture, soft color and obvious stone patterns. When slightly bumped, they make crisp and pleasant sounds. They feel heavy in the hand, which is obviously different from other stones.

B-grade jade: It is made by soaking and corroding the jade with black spots in strong acid to remove impurities and increase its transparency. Then, epoxy resin or alternative fillers are injected into the micro-cracks caused by strong acid corrosion under high pressure. The color of B goods looks good at first glance, but upon closer inspection, the color is dull, and under the light, the color transparency decreases. Within two years it will lose its luster, become full of cracks and become ugly. A slight collision makes the sound dull, without the crisp sound of the A-grade products. How to identify the authenticity of jadeite, you must know

C goods: completely hand-painted. The color is not correct. Looking closely under the light, the color is filled in the cracks of the mineral, distributed in a network pattern, with no color roots. Observed with a Charles filter, green turns red or colorless. By wiping with a strong eraser, the surface color can be removed or turned brown.

Grade D: Impersonated jade jewelry is divided into jade, green glass and green plastic. Jade that impersonates jadeite has low hardness, low density and weaker luster. Most of the substitutes made of green glass and green plastic are dull and ugly in color and have very weak luster. The relative density is very light, the hardness is low, and there is no cool feeling.

Real or fake ice jade: How to identify jade and how to identify the authenticity, you must know

Ice jade has attracted more and more attention and love from people, and its collection and investment are very strong. However, many people who blindly follow others are unable to truly identify and distinguish genuine and fake ice jadeite.

Ice jade is actually a slightly inferior type of colorless or light-colored glass jade. The shape and appearance of the jade are like ice crystals, and it is clear like water, giving people a feeling of icy and jade-like clarity. When you knock on the jade, it makes a crisp metallic sound. Ice jade also looks like the pure and transparent quality of glass jade, but it is three parts warm and seven parts cold. There is an icy texture in its transparency, no cracks, a small amount of impurities, fine texture, and no obvious "lustrous" surface. It often contains "white cotton" in the form of dots or small clumps. The less "white cotton" there is in ice jade, the higher its price will be. Because there is very little white cotton inside, the "high ice type" is almost the same as glass jade, and also has a glassy luster, but the color is cold and not lustrous. How to identify the authenticity of jadeite, you must know

There is a saying in the jade industry: "Laymen look at color, experts look at quality." If the texture is not good, no matter how bright the color of the jade is, it will make people feel dull and lifeless. In the market, a good ice jade bracelet is usually worth tens of thousands of RMB or even more. Ice jade is upper-range or mid-range jade, and its jade is often used to make bracelets, pendants, pendants, bracelets, round beads, etc. Ice jade has received the following praise in the industry: "Ice bracelets are free of glitz and show calmness, and are excellent jewelry for mature women; ice pendants sweep away impetuousness and are the best choice for steady men." The texture of the ice type is similar to that of the old pit type, which is colorless or less colored. The characteristic of the ice type is that the outer surface has a good gloss, translucent to transparent, clear like ice, giving people a feeling of icy and jade. If there is floc-like or discontinuous vein-like blue color in the ice-type jadeite, such jadeite is called "Ice-type Blue Flowers" and is a common variety of ice-type jadeite. How to identify the authenticity of jadeite, you must know

Ice jade does not have bright colors, but with its unique appearance, it inherits and develops the moral values ​​of Chinese white jade culture for thousands of years. Since ancient times, there have been sayings such as "pure as ice and jade", "white as jade", and "jade bones and icy skin". Jade has five virtues: "The color of jade is warm and lustrous, which represents benevolence; the inside can be known from the outside through its texture, which represents being consistent inside and out and having an open mind; the sound of jade is relaxed and clear, which represents being wise and having far-sightedness; jade is hard and would rather break than bend, which represents courage; jade is honest and upright, which represents purity." A good piece of "ice jade" needs to be pure, transparent, white and flawless. It does not have the warm oily luster of white jade, but shines with a stronger glass luster, making it more ornamental and contemporary.

How to Identify the Authenticity of Oily Green Jadeite

Oil green can be divided into primary color and secondary color, and there is also natural oil green and artificially dyed oil green. So how can we distinguish them correctly? In summary, it mainly includes the following three aspects: How to identify the authenticity of jadeite, you must understand

1) The difference between primary oily green jadeite and secondary oily green jadeite;

2) The difference between natural oil green jadeite and imitation oil green B+C jadeite;

3) The difference between natural oil green jadeite and imitation oil green B+C quartzite.

1. The difference between primary oily green jadeite and secondary oily green jadeite

Among the oily green jadeite, there is a distinction between primary oily green and secondary oily green. Native oily green jade is composed of iron-containing pyroxene minerals such as diopside. Since it is colored by Fe2+, the green color is often gray and dark, thus reflecting the oily green color (Figure 1). The secondary oily green color is mainly formed by the penetration of some chlorite clay substances into the gaps and micro-cracks of the jadeite minerals that make up jade (Figure 2). Due to the different causes of their colors, the values ​​of the two are also obviously different. The original oily green jadeite is a mid-to-high-end jadeite with a higher price; while the secondary oily green jadeite is a mid-to-low-end jadeite with a relatively low price. How to distinguish between the two? How to identify the authenticity of jadeite?

The original oily green color is the color that appears in the iron-containing omphacite minerals in jade. The color is uniform and soft. The color tone appears blue-green under transmitted light and will not diffuse and fade. Among the original oily green jadeite, the more expensive one is ice oily jadeite, which is jadeite with an oily green color and a texture of ice or above. It often has a fine texture, uniform color, and will show a soft "fluorescence" under the light (Figure 3).

Secondary oily green is not the color of the minerals that make up jade, but is formed by the infiltration of foreign substances into the gaps and micro-cracks in the minerals, and the color boundaries are obvious. However, when observed under transmitted light, the color diverges, becomes lighter, has no color roots, and appears silk screen-like. The boundaries also become blurred, reflecting the characteristic of "dying in the light".

2. The difference between natural oil green jadeite and imitation oil green B+C jadeite

The market is flooded with imitation oil green jadeite (commonly known as imitation oil green B+C jadeite) that has been artificially acid-etched, dyed with oil green, and then injected with glue (Figure 6). Because its color and transparency are very similar to those of Oil Green Jadeite, and natural Oil Green Jadeite is generally of low value due to its grayish green color and dark tone, people generally believe that Oil Green Jadeite cannot be faked and relax their vigilance. In fact, the opposite is true. Even some jade professionals have been repeatedly fooled by imitation Oil Green B+C jadeite, making it difficult to guard against. The specific identification method is: How to identify the authenticity of jadeite, you must know

1) Look at the color boundary. The color boundary between the oily green color and other colors of natural oily green jadeite is often obvious and clear; the color of imitation oily green B+C jadeite is transitional and the boundary is not clear.

2) Look at the degree of transparency and roundness. Natural oily green jade is round and clear, with uneven transparency. The oily green part has better transparency. Imitation oily green B+C jade is whitish and foggy. The transparency of the colored part is the same as that of the colorless part, with no obvious difference. You must know how to identify the authenticity of jade.

3) Look at the gloss. The luster of natural oil green jade is bright, and the reflection points are relatively sharp if you observe carefully; the luster of imitation oil green B+ C jade appears dim, and the reflection points are scattered;

4) Look at the texture. Natural oily green jade has a strong oily feel and a fine texture; imitation oily green B+ C jade is transparent but has rough particles and a less fine texture;

5) Look at the surface texture. When observing the surface under reflected light, oily green jadeite may show orange peel texture, which appears as shallow uneven protrusions and depressions.

6) Observation through Charles filter. When exposed to light and observed through a Charles filter, natural oil green jadeite does not change color and remains dark green; imitation oil green B+C jadeite will become dark purple-red under the Charles filter. How to identify the authenticity of jadeite, you must know

7) Look at the "rust wire". The colors of natural secondary oily green jadeite and B+C imitation oily green jadeite are the same, and the colors are distributed in a silk screen pattern, the colors are divergent, and no color roots are visible. However, if you observe carefully with a magnifying glass, you will find that the color of secondary oily green jadeite is often uneven due to oxidation on the surface, and yellowish-brown oxidized "rust threads" will appear; while the imitation oily green B+C jadeite has no "rust threads" and when observed under magnification, it is relatively clean and the color tone is uniform. How to identify the authenticity of jadeite, you must know

3. The difference between natural oil green jadeite and imitation oil green B+C quartzite

The so-called imitation oil green B+C quartzite is made by corroding ordinary quartzite with strong acid, dyeing it with oil green, and then injecting glue to form quartzite that imitates oil green jadeite. This quartzite has a fine, round texture, good transparency, and its color is very similar to that of oily green jadeite. It can be found everywhere in the market, so you need to be extra careful. In addition to the identification characteristics of imitation oil green B+C jadeite, the specific identification method also needs to pay attention to the following characteristics: How to identify the authenticity of jadeite, you must understand

1) Look at the structure. Using transmitted light observation, the texture of oily green jade is fine, showing an uneven silk-net-like interwoven structure; the imitation oily green B+C quartzite has a grid-like structure of equal particles, and will show a directional distribution; How to identify the authenticity of jade, you must know

2) Weigh it. The quartzite density of B+C imitation oily green jadeite is only 2.65, which is much lighter than jadeite (density 3.32) when held in the hand.

From the above, we can see that although Oily Green Jade is the most common jade in the market and one of the main jade varieties consumed by ordinary consumers, it is still crucial for ordinary consumers to correctly understand Oily Green Jade, identify its authenticity and judge its value, and it should be paid special attention. How to identify the authenticity of jadeite, you must know

How to Identify Jade Certificates

The Chinese love jade and jadeite, which is a tradition going back thousands of years. Everyone knows that jade is the best choice whether it is jewelry you wear, a gift to friends and relatives, or a family heirloom.

However, since some businesses falsify products and even certificates in order to make huge profits, the vast majority of ordinary buyers who do not have professional knowledge have gradually become frightened and deterred from purchasing. How to identify the authenticity of jadeite, you must know

An effective way to identify the authenticity of jade is to ask the seller to issue an appraisal certificate issued by a national authoritative agency. The appraisal certificate issued by a national authoritative agency has a very high accuracy in jade appraisal, and it should be said that there are very few errors. Even if there is a problem, compensation can be sought. Therefore, the main purpose is to teach you how to identify the authenticity of the appraisal certificate. How to identify the authenticity of jadeite, you must know

First, if it is real jade, the certificate’s appraisal result will indicate “Jade (Grade A)”, but now a new standard has come out, that is, you only need to indicate “Jade” to know that it is natural jade.

Second, if it is B-grade jadeite, the appraisal results will indicate "Jadeite (processed)", "Jadeite (glue injected)", "Jadeite (B-grade)", or "Jadeite (optimized)". How to identify the authenticity of jadeite, you must know

Third, C-grade jadeite will be marked with “jadeite (dyed)”.

Fourth, for counterfeit products, the word "jade" will not appear in the identification results. If it is a substitute, the name of the substitute will be indicated, such as "artificial glass", "dyed quartzite", "Xiuyan jade", "Malay jade", and water jade will be marked as "albite jade"!

Fifth, the certificate contains the picture and weight of the goods, that is, one certificate corresponds to one item of goods. Although some items come from a piece of raw material and look similar in appearance, no two jades are exactly the same. Each piece has its own unique characteristics. A certificate for one item does not prove the quality of the entire batch. In order to save costs, some businesses only have a certificate for one product, but they cannot determine that all the goods they sell are natural, and this practice violates national regulations. How to identify the authenticity of jadeite, you must know

Sixth, some basic physical, chemical and optical characteristics of jadeite will also be shown on the certificate:

Refractive index: 1.66 (this is different from natural jade and other gemstones)

Density: 3.33

Zoomed in inspection: interwoven fiber structure

Absorption spectrum: 437nm absorption line (unique absorption spectrum of jadeite)

Seventh, generally speaking, jewelers’ certificates are entrusted to provincial jewel and jade appraisal centers for testing and processing. They can be checked through the official website and are absolutely impossible to forge. In addition to online inquiries, GTC certificates now also have anti-counterfeiting marks and steel stamps, replacing the red seals that were previously easy to forge.

It is best not to choose a certificate issued by a local quality inspection station. The obvious feature is that the name is XXX city or county or district appraisal center, and it is stamped with a common red seal. In addition, many certificates from non-authoritative organizations have words like "consumers can buy with confidence". Isn't this a case of "there is something fishy here"? This is something that must not appear on a certificate from a national authority! How to identify the authenticity of jadeite, you must know

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