What is jasper--from the mineral composition, jasper belongs to a kind of nephrite, the main mineral is erectite containing tremolite, belonging to the hornblende family, and the tremolite to the erectile stone similar series is close to Yang Shishi Duanyuan. The genesis of jasper is related to the intrusion of magma marble and ultrabasic rock, which is different from other nephrite varieties in terms of genesis. Other nephrite varieties are due to the metamorphism of magma marble, and the iron content of jasper Nephrite higher than other colors.

How much does contemporary jasper know?

1. Xinjiang jasper: Xinjiang jasper is mainly produced by Manas jasper mine. Since the construction of Manas jasper mine in 1973, according to "China Hetian Jade", the annual output of the mine is at least 1 ton, the highest is 35 tons, of which the output was large from 1973 to 1978, the average annual mining volume was about 15 tons, and the lowest in 1979 was 1 ton. From 1981 to 1988, it was basically stable at an annual output of about 5 tons.

Manas Jasper produces both seed and mountain materials, as well as some mountain water. In view of the characteristics of jasper itself, the works with jasper as the raw material are mostly in the utensils, and the times are concentrated in the Qing Dynasty and the Republic of China.

In the mid-to-late 1990s, a group of jasper with a body volume of more than 3 to 4 tons was discovered in Xinjiang. Most of these jasper were mountain water. In my hand, there is a large jasper in this discovery, weighing 8.650 tons, which is extremely rare. This batch of jasper is lighter than the Manas traditional jasper, the texture is fine and uniform, and the oil is characteristic. Such jasper is only a batch, and there will be no output.

In 1975, a large jasper was mined in the red pit of the Manas River. The jade carving of the stone carving “Jianzheng Juzhen” by the Yangzhou Jade Factory was collected in the Chinese Arts and Crafts Museum in Fuxingmen, Beijing. This jasper material is produced in the Manas area of ​​Xinjiang, weighing more than 1,000 kilograms, 120 centimeters high, 90 centimeters wide and 60 centimeters thick. The color of the carvings is green and deep, and the jade is fine and natural.

2. Canadian Jasper: Canada Jasper is mainly produced in the mountains north of Vancouver, Canada. Its hardness is about 6.5 degrees Mohs. It is a kind of nephrite. It is not only the national treasure of Canada, but also the Empress Dowager Cixi in the Qing Dynasty. Favorite. Compared with Xinjiang Manas jade, it has the characteristics of large output, more uniform texture, large block size and bright colors. Due to the supply of raw materials, China imported hundreds of tons of Canadian jasper from Canada in the 1980s and 1990s. This batch of jasper has the characteristics of large volume, less splitting and bright color. This batch of jasper makes up the raw materials of jasper in mainland China. Insufficient supply, due to the mountain material, the output of Canadian Jasper is very large, 4 to 5 tons per piece. Beijing, Yangzhou and Henan have produced a batch of jade carvings made from this material. Most of these works are large in size and complete in texture.

3. Qinghai Jasper: Around 2000, a batch of seed jasper was discovered in the river terrace of the Mangya area where Qinghai and Tibet bordered China. This batch of jasper seed has good roundness and large volume, and its weight ranges from 10 kilograms to several tons. FROMMANGYA Jasper characterized by a few centimeters to 10 centimeters thick hull, the hull having the color of the meat clear boundaries, Jasper FROMMANGYA grayish green color, black spots, lock crack less, poor jade.

4. Russian Jasper: For Jasper, around 2000 is an important period. At this stage, to enter the Russian jasper as a very high-quality varieties to our vision of them. Jade origin mainly in the Russian republic of Buryatia, Irkutsk, Krasnoyarsk Creutzfeldt Magnitogorsk border, the Ural Mountains and other places.

Russia is the primary ore raw jasper shape, these mountain material body mass, good quality jade, lock crack less and less black spots, color blooming large part to achieve a "jewelry class" Jasper, Jasper is a large number of these made into bracelets, Beads and handles make up for the lack of high quality jasper in China. Since 1973, there are not many jasmine products produced in Xinjiang. At present, Russian Jasper is the main raw material used in Jasper in China.

5. New Zealand Jasper: Nephrite, produced in the valley near Kumara, in the western part of New Zealand's South Island, is gravel-like. The shades are often green, dark green, dark green and black, and some have beautiful spinach green (deeper than emerald, with a gray hue) and transparency is generally good. The National Museum of the United States has a gravel of New Zealand jade weighing 7,000 pounds and beautiful green. New Zealand Jasper is characterized by less black spots, but the output is average. New Zealand Jasper mainly by local processors to be made of various types of jewelry.

In addition, with the discovery of geological exploration, there may be other origins of Jasper with different characteristics.

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