Xinjiang's Manas Jasper, also known as Junggar Jasper, is produced in Manas County on the southern margin of the Tianshan Mountains and the southern margin of the Junggar Basin. The main mining areas are the Qingshui River, the upper reaches of the Taxi River and the Manas River in Manas County. Upstream area. The so-called jasper is a kind of Hetian jade with more minerals. The content of iron oxide and clay minerals can reach more than 20%, which is impervious, micro-transparent or semi-transparent. The color is mostly green or dark red and motley. Someone must ask Manas Jasper not to be born in Manas. Is it related to Hetian jade? Yes, in the narrow sense, we put nephrite in the Hetian area (soft jade refers to some of the jewels in the amphibole class). The value of silicate minerals, such as tremolite, actinolite, etc., is called Hetian jade. But in a broad sense, more than 98% of the tremolite composition of jade can be named Hetian jade - this is a common standard of the country, not by origin, but by mineral composition, of course, Hetian is still the largest of Hetian jade Production area. The mineral composition of Manas Jasper is the same as that of Hetian jade, namely tremolite. The main chemical composition is calcium magnesium silicate, hardness 6-7. As a trade name or place of origin, the merchant will deliberately distinguish between Manas Jasper and Hetian Biyu. There are also some tutorials on the Internet that distinguish between two kinds of jasper. Does Tian Heyu feel that the price is high and high? But in fact, if it is mineral composition, this distinction is meaningless, because Manas Jasper itself is Hetian jade. Although it feels that "Hetian Biyu" is more "authentic" and more valuable, the market will be so different, but specific to a piece of jasper, or its own quality is more important, rather than "born." The name of the jade is like the horticultural name of the plant, and sometimes the connotation is uncertain. For example, the saying of Xinjiang Jasper can sometimes include all the jasper produced in Xinjiang, and sometimes it refers to Hetian Biyu. In short, everyone understands the problem of the name of the commodity and the nature of the mineral. The characteristics of Manas Jasper are: the color is different green, such as spinach green, gray green, dark green, dark green, bright green or tender green is rare. In addition, jade will contain black spots, black spots and other impurities. The texture is fine, translucent and oily. Because of the good quality of the block, Manas Jasper is the traditional excellent material for jade carving works. In the Qing Dynasty, Manas Jasper began large-scale mining, mainly used to make larger jade carvings and various utensils. The tremolite mineral crystals in Manas Jasper are extremely small, and are combined into a feather-like form to form a fiber interlaced structure or a felt structure. There are also some needle-shaped tremolite minerals with a slightly larger particle size, accounting for 5-15%. They are non-directionally distributed between fibrous tremolites to form ribbons and chromophores. In addition, jasper sometimes contains epidote and magnetism. Iron ore will also make it color uneven. Maybe you will deny the black spots in Jasper, but the black spots are actually the signature features of Jasper (regardless of where the origin is). Because jasper is rich in a variety of impurity minerals, mainly chrome spinel, magnetite, ilmenite, carbonate, metal sulfide, and metal elements such as iron, copper, chromium, nickel, titanium, vanadium, cobalt. It is the most abundant variety of trace elements in nephrite. These rich minerals, especially iron and chromium, make jasper must have dark spots. Not only the jasper produced in China, but also the Russian jasper produced in Russia. Due to the different origins and minerals, the Russian jasper black spots are relatively small, but many jade lovers complain that its color is too low to look good. You can choose jasper without black spots, but the volume will not be very large, and it is suitable for making a pendant. Large jasper is not allowed to have black spots, impossible.
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