China's jade culture has a long history. Xinjiang Hetian jade is expensive. Yangzhi white jade is the best jade material in Hetian jade. It is in the aspects of texture exquisiteness, quality maturity, appearance moisturization, jade purity and color purity. Excellent top grade, "white and innocent" is well-deserved and extremely precious. The historical origin of Yangzhiyu According to the materials of archaeological discoveries, as early as 3,500 years ago in the Yin Shang period, the jade produced in Kunlun Mountain has been introduced into the Central Plains. After the Spring and Autumn Period and the Warring States Period, Hetian jade gradually became the main jade used by the emperors and nobles of the past, most of which were collected materials. By the end of the Yuan Dynasty, the mountain material was used. After the Qing Dynasty, the output of the mountain material had greatly exceeded the material. Sheep fat white jade has been highly valued since ancient times and is the best in jade. It is very precious. It not only symbolizes the gentleman's character of "benevolence, righteousness, wisdom, courage, and cleanness", but also symbolizes the secular feelings of "beautiful, noble, auspicious, gentle, and comfortable." In ancient times, the emperor was qualified to wear white jade. Archaeological facts have confirmed that the jade used by many ancient emperors is a special white jade. Among the treasures of museums in many localities, the historical relics carved from white jade and jade are not regarded as "national treasures". For example, the Western Han Dynasty "Queen of the Queen" unearthed is made of crystal clear and pure white sheep. The late famous archaeologist of the country, Mr. Xia Wei, once said in the article: "The Han Dynasty jade materials... the milky white sheep fat jade has increased greatly." The physical proof refers to the Han Dynasty aquatic sheep fat white jade. This fully proves that the sheep fat white jade from the theory to the practice is crystal clear and innocent. Its characteristics are: especially white, bright, warm, fine, grease and so on. The best white jade is innocent, the best "white as fat", that is like fat fat just cut. Its hardness is 6 to 6.5, second only to jade. Because of its high hardness, it has not been completely smashed for more than 2,000 years, but it is not unreasonable. The soft ones are chicken bone white, the hard parts are porcelain white, and the parts are exposed to the aging phenomenon. It is not as white as it used to be. This is not a problem, but the characteristics of the ancient jade. The sheep fat white jade has been soaked in water and soil for more than 2,000 years. Its texture is hard and dense, and it is as warm as ever. This is its valuable place, and it is also its valuable value. Five fat appreciation points of Yangzhiyu The white jade is the best of white jade in pure white color. It has the best luster and texture. It is characterized by: warm and firm, pure and pure, white and flawless, like gelatin, hence the name. The simplest way to distinguish this jade from ordinary white jade is to watch it under a white fluorescent light. The white fat white jade is facing the fluorescent lamp, showing a pure white translucent shape with a powdery mist. The general white jade is translucent to the fluorescent lamp, but it has no powdery sensation. The biggest difference between the two is that, regardless of the grade of the white jade, it is very white to the naked eye, but the fluorescent lamp must have a slight yellowish shade under the fluorescent lamp. Therefore, if there is a slight yellow color under the fluorescent lamp, it cannot be called Sheep fat white jade. The rare and precious sheep fat jade that meets the stringent standards is absolutely inconspicuous. The identification points of the sheep fat jade must be satisfied: pure texture, fine structure, water head, white fat, oily weight, only to meet these five aspects is really good sheep white jade. 1. Pure texture - the mineral content of tremolite in sheep fat jade reaches 99%. The sheep fat jade exists in the most perfect part of the wall rock alteration. When the granodiorite is in contact with dolomite, a series of contact metamorphic rocks are formed, and the dolomite becomes dolomite marble. The late magmatic hydrothermal fluid along the dolomite marble tectonic fissure channel is metamorphic to form tremolite. The surrounding rock erosion is transformed into three kinds of lithofacies of dolomite marble-tautronized dolomite marble and tremolite, and the sheep fat jade is stored in the tremolite rock facies. 2, the structure is fine - the tremolite in the sheep fat jade is microscopic fibrillar crystallized crystals and aggregates, the crystal size of the tremolite can be determined under electron microscope and optical microscope, the tremolite fiber in the sheep fat jade Length (longitudinal) 0.033-0.01mm, width (lateral) 0.0006-0.001mm, These microscopic, fluffy, felt-like tremolite crystals are intertwined to form a pile-like structure, a felt-like structure, and an interwoven structure. Microscopic, fluffy, felt-like tremolite crystal aggregates, characterized by orthogonal polarized light, do not exhibit uniform extinction at the same angle. 3, water head foot - water head, spirit land is the name of jade transparency, in tremolite jade often from the thickness of 2mm as the standard, white jade in this standard is translucent - opaque, the head of the sheep fat jade shows translucent shape. 4, sheep fat white - sheep fat white is not pure white, but with a lustrous white, some in white can reveal a slight yellow, poor texture can also reveal a slight light gray tone in white . 5, oily weight - sheep fat jade in the hands of people in the process of continuous touch, self-contained, on the surface of jade produces an "oily" feeling, in some Hetian fine white jade also has this phenomenon, when the sheep fat jade pendant In the water, the jade body is lifted, and the dripping water is not sticky. Therefore, the oily heavy sheep fat is also excellent, and the so-called cotton, which is toughness. Chiffon Fabric,Chiffon Material,Chiffon Cloth,Chiffon Fabric Dress SHAOXING KAIMING TEXTILES CO.,LTD , https://www.kaimingtextiles.com