colour
The common colors of South Red Agate are Jinhong (including persimmon red), rose red, cinnabar red, red and white, blush, and cherry red, which are roughly defined as the color of southern red. These color transparent or translucent variations, including near-transparent colorless, are broadly defined as the southern red color range. The color other than persimmon red and red is composed of extremely fine dots, and this dot-like structure is extremely obvious under a magnifying glass. And the white texture depends on the specific situation, and there are white and red textures like ribbons.
Texture
Nanhong Agate has delicate texture and rare yield. It is a unique variety in China. The general South Red Agate has a gelatinous texture. Even if it is a red-colored South Red Bead, you can see the color from inside to outside. through. The colorless South Red Beads also have a feeling of sputum when viewed with the naked eye, and a similar oily feel like Hetian jade.
How to distinguish imitation Nanhong
As the market price of South Red Agate has risen all the way, imitation South Red Agate has also begun to appear on the market. The common imitation South Red Agate is divided into the following categories:
1, artificial burnt agate
The principle of artificially burning agate reddening is that the agate component contains ferrous ions, and heating causes the ferrous ions to oxidize to ferric ions, thereby turning the white or gray agate into red.
Burnt red agate red is dark, opaque, the color is floating on the surface, unnatural, and it is obviously different from the southern red agate, because the burnt red agate is processed with some light agate. Agate, without the unique oily feel of South Red Agate, and warm characteristics.
2, artificial dyeing
For those agates with low iron content, they are usually soaked in a second iron solution of nitric acid or a first iron solution for about one month, then soaked in a solution of sodium nitrate for about two weeks, and then heated and acidified. It turns red. The dyed agate is observed under a high magnification magnifying glass, and a color distribution of the color distribution along the intercrystalline space is observed, and the glass is strong, and there is no characteristic grease feeling.
3, manual injection
Injection molding is an optimization method that has begun to appear in the southern red agate. The glued agate rough is easier to identify because there is a transparent inclusion with small bubbles on the outer layer. After the engraving, the glue is reddish, and the magnifying glass will observe a filament-like transparent line inside. Usually these lines are straight and have a long penetration and are clearly different from natural texture.
Southern red cleaning method
First, the preparation of the cleaning solution: according to the size of the cleaning jewelry, according to the ratio of sodium chloride (ie: salt) and water 1:50 to prepare the solution.
Second, the South Red agate jewelry that needs to be cleaned is placed in a saline solution, soaking it for one day and one night to remove the bacteria and surface stains it carries.
3. Remove the South Red Agate jewelry from the solution, wipe it with a soft cloth, and dry it in a cool, ventilated place.
Note: You can't heat the Nanhong jewelry at high temperature, which will hurt its internal structure.
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