In view of its authenticity, we can observe it from three aspects: first, because glass is very brittle and hard, its structure is loose, and it lacks the density and toughness of jade, and it can't stand strong high-speed rotary carving. Therefore, high relief and round carving generally cannot be processed on glass.

Second, use a magnifying glass to find bubbles, even if you can only see one, that is, glass.

Third, chromium oxide is added to the glass, and the color is close to ruby; Adding cobalt oxide, the color is close to sapphire; Adding chromium oxide and copper oxide, the color is close to emerald. There are many colors. However, its color tone is always relatively thin, lacking the oily and rich feeling of natural jade color. The more difficult varieties are mainly fake jade made of polymer materials. Its color can be adjusted at will, and it is difficult to find bubbles under a magnifying glass. It is said that the original appearance can be displayed on the infrared spectrometer, but the key to visual inspection is to see whether there are natural stone lines on the surface of the instrument, in addition to the general unrealistic destructive inspection, cracking to find the stone section, burning to see its reaction. After all, manual processing is unnatural and will be exposed under a magnifying glass.

The identification of jadeite can be divided into two categories: new jade and old jade. The identification of new jade focuses on the authenticity of the variety, the quality of the texture and the fineness of the sculptor. Some technical contents have been talked about before. However, the identification of Lao Yu is unusual. In addition to several basic requirements, new jade also needs to know the production age and historical value of jade.

The confirmation of the historical value of jade is based on a clear era. Familiar with the common shapes, characteristic crafts and popular colors of jade in different times. Then refer to the papers on the characteristics of jade in a certain era, and get in touch with each other, and your jade dating level will be rationally improved. At this time, you should contact the real thing as much as possible and correct the parallax between the picture and the real thing in the book.

In addition, the judgment of the times allows a certain span on some jade articles. Because jade tools are precious and not perishable, as a family heirloom, early jade appeared in tombs hundreds of years later, and there are many precedents. The late period of the last era and the early period of the next era are not completely unified in style. Jade has no date, and subtle differences are normal.