Identification of ancient jade texture

The identification of the jade texture relies on visual observation, and the mineral species, chemical composition, crystal structure and physical properties of various jade are determined by means of mineralogical and gemological detection methods. The hardness, specific gravity and refractive index can be measured generally without destroying the original. If the original jade is disabled, a small amount of near-lossless sampling analysis is allowed. The optical properties and structure of the identified jade material can be observed by means of infrared spectroscopy, X-ray powder crystal and scanning electron microscope, and the crystal system can be measured.

According to the general concept of gemology and mineralogy in the world, jade only includes jadeite of alkaline monoclinic pyroxene and nephrite of calcium hornblende, both of which are chain silicate minerals, commonly known as true jade. Does not fall within the above range, that is, fake jade or semi-jade. According to the introduction of Yan Yixuan and Tian Yu, the ancient Chinese jade is nephrite. A total of 8 jade articles were unearthed from the Xinhai Chahai site in Liaoning. The jade articles were all true jade; the Hemudu site of the Majiatun culture was all fake jade; the Qingpu Ruze site in Shanghai was mainly jade, mixed with fake Jade; the late Liangzhu culture, Yuhang anti-mountain, Yaoshan ruins, jade, almost all true jade. For the identification of jade texture, it is also necessary to study its origin, explore the source of ancient jade, and study the interaction and exchanges between various regions and various cultures.

In the Jade Age, in addition to archaeological excavations, using geological stratigraphy and archaeological typology methods, and referring to the age of artifacts, the chronological sequence of unearthed jade articles was determined, and in addition to the evolution process, all land points were lost and the companions could not be identified. The artifacts and the original environment, as well as the ancient jade articles handed down, need to be identified and broken.

There are some jade articles unearthed in China in the early years. Because of the rumors that have been passed down, they have been equated with the handed down products. Based on the newly discovered archaeological materials, these scholars selected the land points and the standard instruments of the era as the scales, and found some ancient jade articles and the above. The similarity between the standard and the pattern of the standard is to summarize the regionality of some ancient jade and to find out the correct time and space. This method of identification and dating has been adopted by researchers.

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