Jade, also known as jade jade, jade, jade, Burmese jade, is a kind of jade, the color is emerald green (called Cui) or red (called ç¿¡). Generally speaking, the value of ordinary jade investment is not high. Only high-grade jade can gain huge value-added space, but the high-end collection-grade jade is less than one ten-thousandth of all jadeite. Therefore, it is necessary to find a boutique from the dazzling jade market. Knowledge and vision. Jade identification notes. First, about "Cui nature" Some experts' monographs consider that natural jade is different from other jade (including jade B goods). The important feature of natural jade is "green" (commonly known as "fly wings"), that is, the crystal flash phenomenon in jade, which is mineral crystal The flash of the face. Microscopic crystal jade generally does not see "cade", so "cade" can not be used as a characteristic mark of natural jade. In other words, it is not necessarily natural jade that there is no "green". Of course, it is easier to distinguish if it shows that it is green. Therefore, Cui Meng believes that the more high-end things, the fewer the cockroaches, but the easier it is to artificially imitate. Second, percussion With the continuous improvement of counterfeiting technology and the continuous discovery and entry of new jade species into the jade market, the percussion sound cannot be used as the basis for judging the jadeite A and B goods. Some jade sellers often use two bracelets to gently strike a crisp "é“›" sound to show that it is a natural jade, and the impact of filling the obvious jade B goods is slightly dull. However, it is not necessarily the natural jade that emits the "é“›" sound. The amphibole and the long jade (such as the "water foam" jade in Myanmar) also have this sound. Certain B goods that are currently on the market can also emit a crisp "beep" sound. Third, the netting The jadeite that has been rinsed with strong acid generally has obvious pore and textured structure. Stress and weathering in natural jade can also produce obvious pore and textured structures, which are often difficult to distinguish from those caused by acid corrosion. "It may not be appropriate to observe that there are cracks, pitting and pits that must be B goods." The natural pores of the jadeite can be filled with later zeolites, clay minerals, etc., and may be filled with mineral powder or polishing powder during the cutting, grinding and polishing process. These fillings are not considered B goods and are easy to identify. Fourth, the classification of jadeite grade Under the premise that the jadeite jade pieces are definitely natural jade, according to the 5C2T standard: composition, color, Clarity, Cut, Carat, Transparency ), Structure (Grain) class and price file. Jadeite is the crown of jade, and high-end jade is constantly creating amazing prices at various auctions. Therefore, B, C and other counterfeit products that counterfeit natural jade emerge in an endless stream, making the merchants, consumers and testers of the brand have a headache. Everyone should pay special attention to the actual purchase of jade. Five, jade identification certificate In general, the identification certificate of natural jade (A goods) will be marked as "Jade", "natural jade", "Jade (A goods)", "Jade (natural)", etc., B, C goods are always marked "Jade ( Processing)" or "Jade (Optimized)". The certificate issued by each institution should be credible, but there are also fraudulent certificates issued by the profiteers' associations, or true certificates and fake jade articles. For example, for some features that are not obvious, use a single product to repeat the identification certificate, and the matching is similar. The counterfeit goods are sold together. There are also some appraisal institutions that relax standards themselves and issue irresponsible certificates for profit. These are still specific questions for specific questions. Look at the various items and certificates. Only when you have more knowledge will you reduce the chances of being fooled. We offer a complete range of BS10 table flanges for use with OD tube and nominal bore pipe in carbon steel and stainless steel to tables D, E, F, and H. Specials can be manufactured to customers' special requirements. We offer a range of ASA 150LB raised face, weld neck, blind and slip-on flanges in grades A105, Q235 and 304, 316 to ASTM A182 specification. BS 10 Flanges,Bossed Flanges,BS10 Blind Flange,BS10 Plate Flanges Shandong Zhongnuo Heavy Industry Co.,Ltd. , https://www.znforged.com