The naked eye identification method of Hetian jade ancient jade

Hetian jade plays an important role in ancient jade articles. There are many methods for identifying ancient jade, mainly including naked eye identification method, mineral identification method, chemical identification method and so on.

China is one of the ancient civilizations in the world. There are many cultural relics. In this precious relic, the ancient jade is a treasure house. China’s unearthed and handed down jade tens of thousands, this is a testimony to the glorious history and culture of China, and a treasure worthy of estimation. Research on these ancient jade articles has far-reaching significance. A problem often encountered in the study of ancient jade articles is the jade problem. That is to say, jade is made of what jade material, and where jade is produced.

Hetian jade plays an important role in ancient jade articles. There are many methods for identifying ancient jade, mainly including naked eye identification method, mineral identification method, chemical identification method and so on. The jade of an ancient jade is visually identified, and its physical properties such as texture, color, gloss, transparency, etc. can be observed to determine the jade species. The naked eye identification, the comprehensive consideration of each feature, can not only look at a little.

colour

The color of Hetian jade is based on white and cyan, and the color tone is relatively uniform. White white jade, especially the sheep finger jade, is unique to Hetian jade. Daiyu and Nanyang jade are also white, but there is no Hetian jade, and some have green and other variegated colors. The blue sapphire is sometimes confused with the green jasper and jade, etc. It is necessary to grasp the characteristics of cyan, which is between blue and green. Hetian jade jade has a leather color, and the leather color tone is mostly brown, limited to local. After the immersion of the ancient jade, the table is also brownish red, but the color of the immersion is often uneven and the color is darker.

texture

Hetian jade texture is dense and delicate, moist and soft, with oily luster, giving people a sense of softness, white jade is especially obvious. Other jade also has a fine texture, but the moisturizing and oily luster is not as good as Hetian jade. In the Qing Dynasty, Chen Sheng’s "Yu Ji" contained: Hetian jade "The jade body is like gelatin, the essence of light is rich, the quality is thick and warm, the pulse is tight, and the sound and sound are bright." These are the typical characteristics of Hetian jade.

Impurity

Hetian jade is pure and has few impurities. Impurities are commonly found in iron and graphite. The iron is mostly distributed in the crack, and it is brown or brownish black, which is discernible to the naked eye. Graphite is black, distributed in the jade, or star-shaped, aggregated, black star points in the white jade, or cloud-like, strip-like black lines, etc., other jade generally do not have this situation. Similar conditions can be seen in marble, but marble is not jade, and the grain size is also very thick and easy to distinguish.

hardness

Hetian jade has a hardness of 6.5 to 6.9, and can not be inscribed with a steel knife. The jade with similar hardness to other jade has jade, Nanyang jade and chalcedony.

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