In the collection of wenwan jewellery, the market of Nanhong is getting hotter and hotter, and it has attracted more and more attention in the market. Judging the quality of Nanhong is not an easy task, especially for the distinction between impurities, waterlines and splitting. It takes a lot of effort. Outer crack 1. Reasons for formation: The formation of Nanhong is due to the ore formed after the eruption of the volcano. It is often affected by high temperature and high pressure and the crustal movement of millions of years. Cracking under the influence of external forces hitting underground strong pressure, earthquake and temperature changes. 2, how to distinguish: the outer crack generally runs through the whole or large part of the original stone, in the form of white lines. The crack of the outer crack is directly exposed to the epidermis, and it can be felt by the nail to touch it. 3. Value impact: A severe external crack will have a partial impact on the price of the finished product. Some players will be eager to avoid the big cracks that run directly through the entire block. The slight external crack is the so-called "no crack and no south red". The natural cockroaches attached to the natural south red should not be too careless, so some small and not serious outer cracks have a long-lasting style. Water line 1. Causes of formation: The geological environment is very unstable. When the initial formation, due to changes in the geological environment, the jade has been squeezed and re-fused, and the density of the materials is different, and then the waterline is generated. 2, how to identify: crack and water line is not particularly easy to distinguish. The outer crack mentioned above can be identified by the way the nails are scratched, but sometimes the small cracks are not accurately felt after polishing. This time you need to use tools to help. Under the illumination of strong light flashlight, the water line can transmit light and crack. 3, the value of the impact: the water line is often found in South Red, in fact, the water line is not counted in the scope. Some waterlines will be praised very beautiful! I think that the waterline material will be more vivid after the artisan carving. In turn, it has become the finishing touch to the icing on the cake. Impurity 1. Causes of formation: formed by the intrusion or intrusion of black volcanic rocks during the formation of the south red. The violent underground activities caused the magma to leak out to the ground. However, because the strength is not enough, it can only rush to the surface like a spring water or erupt at a small scale. Then the magma is combined with surface materials such as gravel, debris and groundwater. 2, how to identify: Miscellaneous refers to the impurities of the mineral itself, does not affect the physical properties of the beads, only affects the aesthetic level, including: black, black lines, black spots, mines and so on. Mine Point: It is embedded like a nail or spread like a gravel, mostly black and white. Agate pattern: strips of red and white parallel, some are reddish, some are whiter. Black: mixed with gravel impurities, etc. Obvious black, black lines, and no touch in the flesh. 3, the value of the impact: impurities will have an impact on the quality of the work, such as large cracks, small miscellaneous energy can be used. The specific value impact depends on the situation. Excessive proportion of impurities, and the original succulent stone is heavier, there is no material. Most of the small miscellaneous, Xiaohei and other small masters can greatly increase the appreciation and value of the product by means of hollowing out and using skillful carving. Dedicated Stitch Bonded Fabric Dedicated Stitch Bonded Fabric,22F Stitch Bonded Fabrics,Stitch Bonded Fabrics Export ,Stitched Nonwoven Materials yizheng jiayu textile products co.,ltd , https://www.jystitchbond.com