1. Product A: The raw materials and finished products of jadeite are genuine, and there is no artificial fraud. It is genuine. High-grade jadeite has property, value preservation and investment. It is not only material wealth, but also spiritual wealth. Because this kind of high-grade jadeite products are very rare, less and less. Therefore, many people who do jade trade rarely encounter such products.
2. Goods B: Physical and chemical treatment is carried out on raw materials or finished products of middle and low grade jadeites with black and dirty bottom and poor water (transparency) but good green color, so as to remove their dirt, increase their moisture, and make them turn bottom into water to better set off the original green color. This kind of jadeite that has been processed but not artificially colored is called B goods. The physical and chemical treatment of B goods aims at improving the grade of jadeite, but the treatment destroys the structure of jadeite, makes it loose, reduces its quality and changes some optical and physical properties, so it can't be compared with untreated jadeite with much lower price.
Third, C goods: the treatment method is the same as that of B goods, except that it is colorless, light green or loose green, and the jadeite products made by artificial coloring are called C goods. The difference between B goods and C goods is that B goods only remove dirt and add water, and there is no artificial coloring, while C goods sometimes have to be artificially colored besides removing dirt and adding water. Emerald with purified bottom water can be directly colored.
Fourth, color: green is the best, followed by purple, cyan and red, and the worst is black and "cat excrement color". Green also has advantages and disadvantages, green leaves are the best, dark green is the best, and green is the best.
Pit: refers to the texture of jade ornaments. Divided into old pits and new pits, the texture of old pits is translucent and almost transparent. The new pit is opaque. A higher degree of transparency is better.
Sixth, the land piece: a jade article, where there is no green is called the land piece. The ground is not necessarily white, but also gray, blue, purple, lake green and blue. A good floor plan can contrast with green, which seems to be icing on the cake. Poor floor plan, although it has a good green color, is set off like a flower inserted in cow dung. So the best land is lake green, glass color and shrimp meat color, followed by lotus root powder land, white bean land and purple flower land, the worst land is ivory land and taro land, and the worst land is dark cloud land and cat excrement land.
Seven, look at the c-goods jade. If you look at the color distribution of jadeite under the light, you can often see that the color is distributed along the crack. This color distribution is unnatural and looks like capillaries. Seeing this situation, we can conclude that the color does not naturally exist in jade, but enters from the outside. In addition, the dyed color has no color root and often floats on the surface of jade, and the color is also "dead" and "dim", without the aura of natural color. To see the jadeite of B-goods, we should turn it over to find an angle where we can clearly see the reflection on the surface of jadeite. Careful observation shows that there are many potholes on the surface of B goods, which are formed by the weathering, wear and peeling of silica gel on the surface. In addition, the luster of B jadeite is different from that of A jadeite. Jadeite has a compact structure and a glassy appearance. Due to the glue injection, the appearance of B jadeite is waxy luster. If it is an emerald bracelet, tap it gently with other jadeites or coins, and the sound of A jadeite is crisp and pleasant, while that of B jadeite is dull and dumb.