Nanhong is a high-grade agate produced in China. It has bright colors, warm texture, and has certain cultural connotations and high ornamental value. Relevant statistics show that the price of Nanhong has risen a hundred times in the past 12 years. The price of Laonan Hongzhu, which has a good texture and good appearance, has exceeded 10,000 yuan, and the price of ordinary old Nanhong has exceeded 1,000 yuan. The price increase of materials far exceeds the rising rate of finished products, and the market outlook is still bullish.
Moisture, compactness and color are the important basis for determining the value of Nanhong. The high-grade Nanhong texture is moist and body-like, and its appearance and feel are close to nephrite. It is not only soft and moist, but also has a certain transparency. There is a faint glow at the edge. In addition, the color is also an important factor in determining the value of Nanhong. Nanhong is dominated by Zhenghong (also known as Jinhong), followed by a subtle and persistent rose red and persimmon red, and again a pumpkin red. But the color should also be combined with the degree of moisturization. Although the red is not moist, the collection value is not high.
As the price of South Red Agate rises all the way, the fake means and substitutes of South Red Agate are everywhere in the market. The main means of South Red's counterfeiting are as follows: Dyeing: The South Red Agate stone itself has higher iron content and is heated. It will turn red, and after being immersed for one month with second iron nitrate or oxidized first iron solution, it will be soaked with sodium nitrate for about two weeks, dried and heated and acidified to make it red. The dyed southern red agate is observed under a high magnification magnifying glass, and the color distribution of the color permeating along the intercrystalline space can be seen. The glass has a strong sense of color and has no unique texture of Nanhong. Injection: The outer layer of the original stone after injection has a transparent inclusion with fine bubbles in between. After the engraving, the green red eye is hard to recognize, and the inside has a transparent line of fine silk. This transparent linear pattern is different from the natural texture and is produced by the filling of the epoxy glue. Artificial burnt color: burnt red agate is processed with some light agate, without the unique oily and warm characteristics of the south red agate, so the burnt red agate is dark, opaque, and the color floats on the surface, not natural. .
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