Where to identify the rough jadeite, where to identify the jadeite

Generally, jadeite rough can be identified by a local jewelry and jade appraisal agency. Of course, if you find it troublesome to send it for identification, you can judge its authenticity by listening to the sound, weighing the weight, and scratching the hardness. Normally, the natural jadeite rough makes a crisp sound after being tapped, and its hardness is large, and there is a downward feel in the hand, and it will not leave traces after scratching.

On the contrary, the fake jadeite rough makes a dull sound after being struck, and it is light and fluttering in the hand, and even leaves obvious scratches.

Jadeite is a kind of jade, the color is emerald green, called jade, and red, called jade. Jadeite is a jade-grade stone polycrystalline aggregate formed under geological action, mainly composed of jadeite, sodium chromium pyroxene or sodium calcareous pyroxene, which can contain amphibole, feldspar, chromite, limonite, etc.

At present, the world's main jadeite producing areas are Myanmar, the United States, Japan, China, Guatemala, Russia and other countries, among which Myanmar has the highest jadeite production. Ninety-five percent of the commercial jadeite on the market comes from Myanmar, and most of the gem-quality jadeite comes from Myanmar.

Often, a local jewellery and jade appraisal agency can identify rough jadeite. Of course, if you find it troublesome to send it for identification, you can identify it by listening to the sound, weighing the weight, and scratching the hardness. Here's how:

1. Listen to the sound: use a rope to hang the jadeite in the air with a thin line, and then gently tap it with a glass rod, if it makes a crisp and melodious sound, it is a natural jadeite, on the contrary, it makes a dull sound after hitting it is a fake jadeite rough.

2. Weigh the weight: Due to the high hardness of the natural jadeite rough, put it in the palm of your hand and shake it up and down a few times, there will be a downward pressure or heavy feeling. If it is fake or the processed jadeite rough will feel fluttering in the hand, and it will not feel heavy and oppressive.

However, you should be very careful when handling the rough jadeite to avoid accidentally breaking the jadeite rough.

3. Scratch hardness: Because the Mohs hardness of jadeite is between 6.5 and 7, it is higher than the hardness of glass. If you use a sharp and sharp tool to scratch on the surface of the jadeite rough, the real jadeite has a smooth feeling and will not leave scratch marks; The treated jadeite rough will leave obvious scratches on its surface after scratching because the structure is damaged.

Xinchangkou jadeite rough can be identified by professional jade appraisal centers, such as the National Jewelry and Jade Quality Supervision and Inspection Center, Yunnan Jewelry and Jade Jewelry Quality Supervision and Inspection Institute, etc. The most authoritative is the national level, the National Jewelry and Jade Quality Supervision and Inspection Center (formerly affiliated to the Jewelry and Jade Jewelry Management Center of the Ministry of Land and Resources) and so on.

Identify the jadeite rough and go to a professional storefront.

The identification of jadeite requires professional knowledge and skills, and it is best to go to a professional appraisal agency or shop for identification. Here are some of the establishments or shops that may offer jadeite identification services:1

National Jadeite Testing Center: This is an institution approved and authorized by the General Administration of Quality Supervision and Inspection and Quarantine of the People's Republic of China and is responsible for the testing and identification of jadeite. In Chinese mainland, you can refer to the official ** of the national jadeite testing center for more information.

2.Jewelry or jade shops: Many jewelry stores and jade shops have professional jade appraisers.

You can choose some reputable shops for consultation and appraisal. 3.Emerald Society:

Some jadeite associations also offer jadeite identification services, so if you're in the area, try contacting your local jadeite association for information. Please note that choose a professional institution or store, and pay attention to the qualifications and reputation of the appraiser, so as not to be affected**.

The methods of identifying jadeite rough include acid dropping, texture, hardness, stone skin, color, transparency, etc.

1. Acid drops. Artificially forged jadeite rough is generally quartz, dolomite or marble, etc., can be determined by acid dropping, if it is a fake jadeite rough, it will generally produce a bubble reaction, if it is jadeite, there is no bubble reaction.

2. Texture. To identify the jadeite rough, you can look at the texture, open a small window on the surface of the jadeite rough, and light it to observe, the texture of the real jadeite rough is uneven, and there will be some flaws and cracks inside; The texture of the fake jadeite rough is more blurry, and the interior appears too pure.

3. Hardness. Compare the hardness of the jadeite rough, use a knife to scratch the surface of the rough, the real jadeite rough has a high hardness, and the surface will not easily leave scratches; The hardness of fake jadeite rough is low, and it is easy to show obvious traces after carving.

4. Stone skin. Jadeite rough stone generally has a certain sand skin, divided into sand stone, water skin stone, wax skin stone. The external particles of sand stone are coarse and have a gritty feeling to the touch.

The skin of the water skin stone is very thin, and the inner color can be seen through from the outside. Wax stone is very smooth, as if it has been coated with a layer of wax.

5. Color. The color of jadeite is often uneven, but it should show a bright, natural, and harmonious color. It is best to choose rough stones with pure color and high saturation.

6. Transparency.

The higher the transparency of jadeite, the higher its value. Jadeite with high transparency allows light to penetrate the stone, revealing a delicate texture. Stuffy.

See, through the naked eye and the use of magnifying glasses and microscopes, observe the external characteristics, texture, color, structure, cracks and later fillings and other characteristics of the rough stone, and identify the authenticity of the rough jadeite.

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Weigh it by hand, check its weight, the real rough stone is heavy, the density is more than 3g cm, the fake rough stone is light, and the density is below 3g cm.

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Under strong light and sunlight, use opaque metal cards or lamps to observe the hue around and inside the leather shell, the direction of green, the change of luster, and the strength of the reflection.

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Knock, use a hard object to listen to the sound, the real jade structure is dense and solid, and the sound is crisp.

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There is no such thing as identification of jadeite rough, but a pair of discerning eyes may be needed for good quality jadeite rough. Look, it takes considerable experience, the field, since ancient times, there is a saying that the gods are difficult to break the inch jade, density, weight, can be illuminated with lights.