Old jade refers to natural jade, which has been polished, polished and carved without artificial optimization. Its texture is natural and its value is relatively high. But from the perspective of the antique industry, it refers to the jade articles in the Ming and Qing Dynasties and the Republic of China, and there is still a period of history.

The characteristics of old jade: living jade (actinolite and sodalite) has good water head and high transparency between materials. Its top-grade transparency is like glass, which is called glass seed and ice seed. Its types are green and lovely, called high green, bright green and green.

Collection value:

First, jade itself has no new and old problems, and it takes 300 million years to form. The so-called old jade can only be explained by the degree of use. At present, jade articles that have been used for more than 100 years are called "old jade articles" in the industry.

Second, from the old jade, the collection is not the jade itself, but its story, its history, its cultural connotation and its characteristics of the times. Stories are valuable and the characteristics of the times are worth collecting, so not all old jade articles are worth collecting.

Third, compared with the old jade, the new jade material is better, moist, dense, white and flawless, and it seems to coagulate fat. Now the carving technology is getting better and better. Except for the material, the old jade piece is not as good as the new one, but due to its long service life, there are still some defects, such as cracking and deformity.

Extended content

Generally, jade articles before the Han Dynasty are "ancient jade", and museums in the United States and Britain, as well as collectors of ancient jade in Hong Kong and Taiwan, like to collect ancient jade articles before the Han Dynasty. So, how to preliminarily identify ancient jade?

1. First of all, read carefully and read more monographs on ancient jade. These academic works are rich in knowledge. Recommended books are: Textual Research on Ancient Jade written by Wu Dazhi in the late Qing Dynasty, which gives a detailed explanation and textual research on the age, use, name and size of ancient jade. The drawing is accurate and of great reference value.

In addition, The Complete Works of Fine Arts and Jade Articles in China, The Complete Works of Jade Articles in China published by Hebei Fine Arts Publishing House, Zhou Nanquan's Ancient Jade, Zhao Ming and Li Qun's Ancient Jade, The History of Jade, Hong Kong experts' Discrimination of Ancient Jade, Folk Ancient Jade, Protecting Jade and Preserving White Jade, and Taiwanese experts Li,

2, direct contact is very important, the average person can only look through the glass in the museum, and should see as many kinds of ancient jade as possible. You can feel the difference if you touch it too much. The real ancient jade has a long history, heavy hand feel, smooth appearance, natural color, neat knife work and moist patina. Xinyu doesn't have these feelings.

As early as Song Dynasty, antique jade appeared. At that time, someone forged chicken blood with rainbow grass; After the Qing dynasty, there were more and more cases of counterfeiting, and there were many innovations in technology, such as "dog jade", "sheep jade" and "wind jade", which attracted people to be fooled. At present, fake jade synthesized from jade powder by artificial high pressure has appeared in the market, and its color and hardness are similar to Hetian jade, so special attention should be paid to identification.

4. The real ancient jade includes soil infiltration, lime infiltration, mercury infiltration, corpse blood infiltration, cinnabar infiltration, copper infiltration, surface oxide layer and so on. Some spots of fake jade are fried, some are baked by fire, and some are etched by chemicals. In this regard, it is particularly important to find out the differences and differences between genuine and counterfeit products in terms of color, luster and thickness.

5. The carved lines on the jade surface have different cross sections, such as V-shaped, semi-circular and U-shaped. U-shape is the characteristic of modern machinists. The color and patina of the leather shell on the surface of the slot are consistent. It can be initially judged to be genuine, and the hairline cracking on both sides of the line notch is the characteristic of modern "machinists".

References:

Appraisal of Ancient Jade-Baidu Encyclopedia