Generally speaking, the "four famous jade" in China refers to Hetian jade produced in Xinjiang, xiuyan jade in Liaoning, dushan jade in Nanyang, Henan and turquoise produced in Yunxian, Hubei.
(1) Hetian jade is mainly distributed in shache-Tashkurgan, Hetian-Hetian jade and the northern slope of Kunlun Mountain, which stretches for 1.500 km in Qiemo County, Xinjiang, with 9 producing areas. Hetian jade is mainly tremolite-actinolite, and contains a small amount of diopside, serpentine, graphite, magnets and other minerals, forming white, turquoise, black, yellow and other different colors, mostly monochromatic jade, with a few variegated colors. Jade is translucent, greasy and shiny after polishing, and its hardness is between 5.5 and 6.5 degrees. Hetian jade is sandwiched between rocks at an altitude of 3500 meters to 5000 meters. After a long period of weathering, it was stripped into pieces of different sizes, collapsed on the hillside, and then washed by rain and flowed into the river. When the river dries up in autumn, the jade pieces collected in the river bed are called seed jade, and those mined in the rock stratum are called mountain materials. The earliest Hetian jade has been found from Fu Hao's tomb in Yin Ruins. After the Spring and Autumn Period and the Warring States Period, Hetian jade gradually became the main jade material, and it was not until the Qing Dynasty that the mountain material was mined. Yushan, carved during the reign of Qing Qianlong, weighs 10700 Jin, which is taken from Maitreya Mountain.
The economic value of Hetian jade is evaluated according to the purity of color and texture. Its main varieties are:
White jade: It contains more than 95% tremolite, with white color, pure texture and delicate luster. It is a high-quality variety of Hetian jade. During the prosperous period of jade-making in Han, Song and Qing dynasties, great attention was paid to the selection of materials, and high-quality white jade was often carved into "heavy objects".
Sheep fat white jade: the top grade of white jade, pure and delicate in texture, containing tremolite as high as 99%, and its white color is as delicate as jelly. The economic value of jade with the same weight is several times that of white jade. Sheep fat white jade was highly respected in Han Dynasty, Song Dynasty and Qing Qianlong period.
Blue white jade: There is no obvious difference in texture from white jade, but the jade color is pale turquoise, which is the third-class jade material in Hetian jade, and its economic value is slightly lower than that of white jade.
Sapphire: It is called sapphire when its color is light blue, turquoise and gray. Uniform color, fine texture, tremolite 89%, actinolite 6%, oily, rich in reserves. It is the main variety of jade collected or mined in past dynasties.
Topaz: The matrix is white jade, which is yellow in cracks due to the long-term infiltration of iron oxide in surface water. According to the color change, it is named as: dense wax yellow, chestnut color, okra yellow, yellow flower yellow, egg yolk, etc. Close wax yellow and chestnut color are extremely rare, and their economic value can reach sheep fat white jade. In the Qing Dynasty, topaz homophoned "emperor", which was extremely rare, and its economic value once exceeded that of white jade with sheep fat.
Tang Yu: Iron oxide permeates tremolite to form different shades of red skin, with deep red as "Tang Yu" and "Tiger Jade" and white with pink as "Pink Jade". Sugar jade often forms a two-color jade material with white jade or plain jade, which can be used to make "pretty jade". The snuff bottle made of sugar jade shell seed material is called "gold-coated silver", which should be able to add value.
Jet: Tremolite containing graphite and magnets is black. The jet is mostly gray or gray ink jade with black stripes, hence the name "dark clouds, light ink, golden sable whiskers, beauty temples, etc." . Pure lacquer ink with dense black spots is more valuable than other jet varieties. Jet has a waxy luster, which is not suitable for carving patterns because of uneven color. It is mostly used to make utensils inlaid with gold and silver thread.
Jasper: produced in Junggar jade mine, also known as Tianshan Jasper. It is grayish green, dark green and dark green, with pure dark green as the top grade. The quality of black spots, black spots or jade tendons is one grade worse. Jasper contains more than 85% tremolite, with delicate texture, translucency and oily luster, belonging to mid-range jade.
(2) xiuyan jade was born in Xiuyan, Liaoning, China. Xiuyan County is a place with beautiful scenery and rich products, and it is a treasure trove of geomantic omen. After thousands of years of natural evolution, it has condensed the essence of thousands of years of mountains and rivers, thus producing a world-famous national treasure-xiuyan jade.
Jade is one of the four famous jade in China, which can be roughly divided into two categories. One is the old jade (also called Hemo jade), which is a precious rough jade with simple texture, dignified and dark green color. The other is nephrite, which is solid and moist, delicate and round, mostly green, of which pure white and golden are rare treasures.
Jade is produced in the rich context of the earth, and has absorbed the essence of heaven and earth and the aura of nature in the course of thousands of years, so it has great feng shui value besides collection value.
Because modern human beings live in buildings, the reinforced concrete of modern buildings separates the breath of nature from the magnetic field, which makes the distance between human beings and nature farther and farther. If a beautiful jade can be placed at home, it can not only play a pleasing ornamental value, but also bring natural atmosphere to the home, supplement the indoor natural magnetic field and adjust the indoor feng shui climate.
"Righteousness exists in memory, and evil cannot be done." There are beautiful jade in the house, and evil spirits are inviolable. Wearing a beautiful jade will increase a natural force.