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The crack should be an unhealed crack in the jadeite, which can be internal or visible on the surface, and most cracks on the surface can be felt when the nail picks at it. Generally, it is artificially formed in the process of mining and processing or formed under geological action, and appears as a dark line. Generally speaking, cracks are more serious blemishes.
Stone grain is the internal healing crack of jadeite, which is formed after the jadeite is formed after the cracks are produced under geological action, and the minerals are filled with minerals through geological action to make the cracks heal. Under the irradiation of transmitted light, it is the same as the brightness of jadeite. The surface is not felt with a fingernail.
The stria is innate, and the fissile is congenital (acquired healing, so there is mineral deposition) and later external force cracking, external force cracking.
can be picked by hand) and internal fissures (can not be picked by hand. Lines and cracks are not the same. It is understandable to regard wrinkles as congenital cracks.
The jadeite is cracked inside, and it can be seen on closer inspection.
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Cracks in jadeite are generally divided into two types:
One is called the dreadlock, also called the stone grain, which is a crack produced in the process of jadeite formation, which gradually heals in the later growth, just like a human wound scabbed, this texture has no effect on the durability of the jadeite, but it will have different degrees of impact on the water head.
The other is called fissure, which does not heal during growth, just like Zhou Yu lost Jingzhou, and the gold sores burst out and did not grow completely. Cracks can be felt on the surface and have a great impact on quality.
For jadeite bracelets, small locks are acceptable, and if there is a crack, don't consider it.
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The method of judging whether the jadeite is cracked or wrinkled is: 1. The light irradiates to see whether the jadeite bracelet is a pattern or a crack can be illuminated by the light, and the pattern of the jadeite bracelet is easy to identify when illuminated by transmitted light, but it is not easy to see under the reflected light, and the crack of the jadeite bracelet can be seen under the reflection of white light. 2. Touch with your hands In addition, you can also tell whether it is a pattern or a crack by touching it with your hand, and the lines of jadeite generally exist inside, so you can't feel it when you touch it with your hands.
The crack of the jadeite is damage from the inside out, even if the smile is polished, you can still feel the obvious obstruction texture. 3. Look at the shape from the shape of the jadeite pattern and the crack, the jadeite pattern is usually in the form of a line, and its color is inconsistent with the surrounding color, while the shape of the crack is similar to the grain, but there will be a certain gap. If you have any questions, you can call this ** consultation by yourself, but it is recommended that you call during working hours, because if you call during non-working hours, there may be no one to answer and empty <>numbers
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<>1. Identification with eyes: Observe the texture of the jade piece by pointing it at the light, and if you can see the gap segmentation, it is a crack. If the gap is not obvious, it may be a growth mark or a crack, and if it is not certain, further examination can be done to identify it by hand.
2. Identification by hand: You can touch the jadeite with your hands or scrape it with your fingernails, because the human body is more sensitive to touch than the eyes. If there is obviously a feeling of jumping, or "scraping" or "hooking" the nails, it can generally be judged to be a crack.
If you don't have a clear sense of jumping and stupidity, but only feel a faint friction resistance, it may just be a stone pattern.
3. If you are still worried, you can use a ten-fold magnifying glass to observe. Under a ten-fold magnifying glass, the crack of the jadeite should be an open structure, and there is no filling. Unlike stone grain, which is a linear structure similar to a bread-like pattern.
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