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The stone patterns and cracks of the jade are two different concepts. The split cracks and the cracks are called 绺, which are all understood in the jadeite line: the jadeite.
The cracks and stone patterns of jade can be compared with the wounds of the human body. The cracks are like the wounds that just appear in the human body. The flesh between the wounds can be completely separated, and the stone streaks are like the wounds that are about to heal, and have not reached the normal flesh. Density, a little effort, this quick healing wound will separate. The general consumer lacks knowledge of jade,
The difference between the cracks and stone patterns of jadeite can not be distinguished. When buying jadeite, it is easy to be misled by jewelers, and the big crack is said to be stone.
1 stone
Stone pattern refers to the small gap formed by the combination of jade crystals. The fine gaps are arranged in a line or knife-like shape, which is the "stone pattern" understood by the jade industry. Because it is a small gap, many The color of the stone pattern is white or milky white, and if there is a foreign color, the filling will give a certain color. If such small voids are arranged in a cluster or cloud, they become so-called "white cotton", "black cotton" or so-called "impurities". These small gaps are not equal to the state of completely uncombined between the jade crystals, but are sparsely and sparsely combined, and the firmness of the combination is much worse than that of the normal jadeite. The stone pattern is easy to recognize under the transmission of transmitted light, but it is not obvious under the reflected light, or it only shows the change of transparency or the feeling of "green", which has less influence on the appearance of jade, and the firmness of jade. It depends on the size and number of small gaps.
Stone pattern on jade bracelet
Stone grain
1. Naturally formed. During the growth of jade meat, the crystals of jade crystals are interfered by foreign substances, causing their growth to be incomplete or the growth space to be affected. The jade crystals cannot completely overlap together, resulting in a certain small gap, that is, stone grain, or asbestos. , white cotton. Asbestos in a line or knife-like arrangement is the stone pattern I often see.
2. Formed later. During the whole growth process of jadeite, it is subjected to external stress for a certain period of time, and the fracture occurs instantaneously. The jade crystal is broken or the crystal is completely separated. With the later jadeite growth, a certain number of new emerald crystals are generated in the interstices between the crystals. To some extent, it fills the gap of the fracture and plays a role in the connection and reinforcement of the jade meat.
2 crack
The crack is the fracture gap of the jade, and such a fracture gap can hardly cause adhesion and firmness to the jade on both sides of the crack. We now see that the crack is actually the early stage of the appearance of stone. If humans did not extract the jade, maybe it would go through hundreds of millions of years of address, the crack will also evolve into stone, and even the crack growth will be completely seen. The normal jade fleshy.
Cause of crack
1. The late stage of jade growth is affected by the stress of nature. Shear or tensile cracks formed by stress during geological movements such as earthquakes, thermal expansion and contraction of crustal temperature, and impact of riverbed handling.
2. The role of man-made. Such artificial effects generally include the destruction of jadeite by the mining, transportation and processing of jadeite.
3How to identify the stone and crack of the jade
1. You can't determine whether it is a crack or a stone pattern with a nail scraper. If it is obvious that it will "scrape", "hook" the nail, or if there is a clear sense of jumping during the scraping process, it can basically be considered a crack. There is no jumping feeling when scraping, only the faint frictional resistance, which may be stone, because the stone is not dense enough and the surface is not very smooth.
2. If you are still not sure whether it is a stone or a crack, it is recommended that you observe it with a ten-fold magnifying glass. Under the ten-fold magnifying glass, the crack is an open-like structure, and the stone-like structure is a bread-like linear structure. Although it is not dense, it is closely related to each other. The stone pattern looks like the color root of the jade, because there will be some mineral filling in the later stage of the jade formation, so it seems that the texture is different from the color of the surrounding jade, and the crack is not.
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