Brief introduction of jadeite

What is jadeite jade? Emerald jade is a beautiful stone with a unique emerald, which is not found in other jade. The word jadeite means that red means Fei and green means Cui. Emerald jade is a transparent crystal glass luster in emerald green, apple green, purple, red yellow, snow white and black. Jade is also called jadeite (a kind of gem name), its mineralogy is called sodalite, and its chemical composition is sodium silicate and aluminum silicate. Its crystal structure is stable, with Mohs hardness of 6.5-7.5 and specific gravity of 3.3. Jadeite is produced in Rada, Pakan and Houjiang in the upper and lower reaches of the Wulong River in the Lu Wu Valley in northern Myanmar. Emerald jade was not used by China people until 1970s (before it was white jade and sapphire produced in Xinjiang, China). Jade is the king of jade. The supply of high-grade jade exceeds demand. Things are scarce and expensive, and the price is quite high. This is the reason why gold and valuable jade are priceless. Emerald jade can be divided into mountain materials and sub-materials. Among them, the mountain material has no crust, which is associated with the original rock without weathering and crushing, while the clay material is weathered and crushed, washed and transferred by sediment flow, and then weathered again to form crust (the formation of crust is closely related to local stratum changes, terrace ups and downs, vegetation geology, water quality, etc.). The exploitation of Shapi Jade Field can be divided into three layers, the first layer is yellow sand skin, the second layer is yellow red sand skin, and the third layer is black sand skin and black wax skin. The jade material at the mouth of Kenghe Mine is called Shui Pi because of its texture and color. Landscape is the jade between Shapi and Shui Pi, and later generations also call it semi-landscape or water returning to sand. This kind of jade is not completely wrapped by the leather shell, and almost no water can be seen on the surface of the jade. Among them, the jade materials of thin red wax, black wax and yellow white wax produced in Laochangkou of Houjiang are of good quality. At present, most of the jade processed by our Sihui is transported from there by carpets and mats. A-goods jade B-goods jade C-goods jade The so-called A-goods B-goods and B+C-goods are code names that people separate natural jade materials from non-natural jade materials that have been chemically treated. B-goods and B+C-goods first appeared in the jadeite market in Hong Kong in recent ten years, and their technology was introduced to the mainland. A goods are generally made of jade ornaments, playthings, pendants and ornaments with good quality of colored water, which are directly processed by traditional handicrafts. A goods will never change color or go bad. Green jade with good quality is the best in A goods, and purple jade is also a rare treasure in jade, with extraordinary value. Wearing high-grade A jade is a symbol of noble status, which makes people relaxed and energetic. Some people even say that wearing a piece of jade will make people feel lucky, get what they want and turn bad luck into good luck. A-goods jade articles have considerable potential for preservation and appreciation, and are highly collectible. Goods B refer to the unnatural jade materials made of middle and low grade jade materials in Myanmar, which are short in water, thick in grinding, full of cracks, rich in impurities and low in hardness. They are soaked in acid and alkali alternately for half to one month at room temperature, boiled in clear water, then air-dried, injected with epoxy resin under high vacuum and baked for two or three days to improve purity, hardness and transparency. The color of commodity B is natural and true, but the texture is unnatural. All kinds of handicrafts and hand ornaments produced by commodity B are cheap and fine, and the wearer is harmless to the human body, but they have no preservation and collection value. Commodity b will age and yellow to its original appearance after ten or eight years. What is C goods? C goods are real jade, but the color is fake. In the processing of C-goods, jade materials are generally heated and colored. The jade materials are heated to about 1 10 degrees, soaked in chromium salt solution for several hours to one or two days, and the chromium salt permeates and precipitates in the grain gaps and small wall gaps of the jade materials for dyeing and coloring, so as to achieve the dyeing effect. Dyeing is mainly green and purple, with lake color and clear flower color. The color of C goods is dyed on the surface of jade, so the retention time is short. Generally, the color of legs will change in one or two years (B+C method is more common in the market at present). C goods are genuine jade and fake color, cheap and good quality, and harmless to human body. B+C goods are processed by combining B goods and C goods synchronously. The jade material with loose structure and transparent B is partially or completely dyed into the required color according to the needs, and the dyed color can penetrate into the center. After the color is air-dried, epoxy resin is injected at high pressure under vacuum and dried in a constant temperature box for three days. After drying, the resin will reach the required hardness, and finally it will be processed into colorful handicrafts and beautiful handicrafts. B+C goods are fake in texture and color, with the lowest value and no harm to human body. There is also a shower product. Shower goods are not B goods, nor are they fakes. They are real jade and real water, but the stones are gray and black. People call it cat water or aquatic products, which have been polluted by water for a long time. In order to restore its true colors, it is only necessary to remove the invaded color, which will not cause harm to the matrix of jade materials, and will be more harmful to human health.