How to see if jade is an ancient jade?

1. Glossy appearance: whether it is translucent or opaque, real jade has a warm luster, and it is normal to have a small amount of impurities or cotton-wool patterns inside; Fake jade articles are dry and dull, and some have bubbles.

② Hardness measurement: Carve and scrape with a knife, leaving no trace of real jade.

(3) The proportion of jade: real jade feels heavy, while fake jade floats lightly.

(4) Listening: hanging jade with a thread and knocking with a hard object, the authentic sound is crisp and pleasant, and the aftertaste is melodious; The fake one is dull and dry.

⑤ Look at the fracture surface: With a magnifying glass of 10 times, the fracture surface of real jade is uneven, and a fine structure can be seen; Fake jade articles have neat and shiny fractures, often glass imitations, while those with rough fracture structure and waxy luster are stone imitations.

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How to identify the authenticity of jade (ZT)

Jade culture is a profound and special culture in China, which runs through various historical periods in China. About 500 Chinese characters come from the word "jade". Many people add the word "jade" to the description of beautiful things, such as jade girl, jade hand, jade capacity, jade photo, jade body, etc ... Even if they make sacrifices for justice, they are described as "jade broken".

Jade has a wide meaning. Generally speaking, beautiful stones that are naturally generated and processed into delicate, smooth, bright-colored, tough and chemically stable can all be classified as jade. What people usually say about jade is actually nephrite and jadeite. Nephrite refers to jade composed of tremolite-actinolite minerals, namely white jade, jadeite, jasper and topaz. Jadeite refers to jadeite similar to nephrite, which is native to Myanmar. Diamonds, rubies, agates, corals, coal crystals and tortoise shells are all "organic gems". People's requirements for soft and hard jade are the same, that is, the ones with hard and dense texture and bright and beautiful color are better.

China Neolithic jade, the earliest data can be found in the Xianrendong site in Haicheng, Liaoning, about1.2000 years ago. This is a snake-shaped stone tool. Later, with the invention of grinding technology, people finally found regularly that there are still a number of materials in the stone that are particularly delicate and beautiful after grinding. Although people don't know it is jade yet, it has been deliberately selected for human body decoration.

People who play jade for the first time are most afraid of encountering fakes because they don't understand jade. At present, the identification of glass imitation jade products on the market is probably the most common and simple one among fakes. Common ones are bare small rings, chicken hearts and jade pieces called "emeralds". Because this kind of glass product is made by casting mold, the high-temperature glass liquid will overflow a little at the edge of the object when it is combined, and it will become a slightly convex fan line after cooling. Touch it with your hand, and your eyes will find something. If you look at the light with a magnifying glass, there must be large and small bubbles inside.

If experts are not invited, people who use jade for the first time should identify the authenticity of jade by themselves, which can be observed from three aspects:

1. Because the texture of glass is very brittle and hard, the structure is clearly arranged, and it lacks the density and toughness of jade, so it can't stand strong and high-speed rotary carving, so it is generally impossible to process high relief and round carving on glass.

Second, use a magnifying glass to find bubbles, even if you can only see one, you can confirm that it is not jade.

Thirdly, chromium oxide is added into the glass, and the color is close to ruby; Adding cobalt oxide, the color is close to sapphire; Adding chromium oxide and copper oxide, the color is close to emerald ... and so on, there are many kinds of fake jade. However, their colors are always relatively thin, lacking the oily and rich feeling of natural jade color.

The identification of new jade and old jade is different. The identification of new jade focuses on the authenticity of the variety, the quality of the texture and the fineness of the sculptor. The identification of old jade is relatively complicated. In addition to several basic requirements, new jade also needs to identify its production and historical value.

Textual research on the historical value of jade is based on a clear era. To be familiar with the common shapes, characteristics, crafts and colors of jades in different times, we can often consult books and materials on jades, which will subtly improve the dating level of jades. Contact with real objects as much as possible can correct the parallax between pictures and real objects in books.

How to distinguish real jade from fake jade

At present, some booths selling Baoyu in the market are often mixed with some exquisite artificial jade. The more reliable identification methods are: seeing, listening and testing.

Look, mainly depends on the crystal transparency, real jade has strong transparency and oily luster;

Listen, Zhen Yu's voice is crisp, but her voice is dull;

In the test, the real jade scratched the glass, but the jade itself was intact.

Common fake jade includes plastic, stained glass, marble, electrochromic fake jade made of jade powder and crystal with salt water, imitation jade containing nitrate, etc. And their identification methods are different.

Plastic is lighter than jade, and its hardness is poor, so it is generally easy to identify.

It's easy to distinguish between painting and getting off work. As long as you take it under the light or check it in the sun, you will see many bubbles in the glass.

It is difficult to distinguish fake jade by electric color. Its purpose is to electroplate inferior jade and then coat it with a beautiful emerald appearance, so it is easy to mistake it for real jade. At this time, you need to observe carefully. If there are some small cracks with blue in the green, it is fake jade. Because electroplating will leave cracks, experts call it "spider claws". It is also said that if the electro-colored fake jade is put in hot oil, the electroplating color will fade and return to its original color.

Synthetic jade made of jade powder, crystal and salt water is an imitation dark old pit jade. The identification method is simple, that is, their specific gravity is different. The specific gravity of natural jade is 3.3-3.4, while that of synthetic jade is only 2.8. Weigh by hand, or use a balance to distinguish between true and false.

Jade imitated with nitrate looks whiter and smoother than jade. The ancients said, "Jade is better than salt, so it must be high." That is, white jade should be as advanced as nitrate. It can be seen that nitrate and jade are difficult to distinguish. However, the facts are different after all. As far as color is concerned, white jade is often blue, and white is rare, while nitrate is pure white. As far as jade is concerned, jade is moist and delicate, as fat as cream. Nitrate is wet, but there are thieves in it. White jade is a natural product, and it is difficult to have a unified structure, including jade ribs and jade flowers. If nitrates are manufactured artificially, there is no such appearance. White jade has a solid texture and no bubbles can be found. No matter how well nitrate is treated, bubbles and pores are often exposed. If you know these items, you won't regard nitrate products as jade articles.