A yuyou told Teacher Zhang Yang with great interest that he was afraid of the false skin of the seed material, the second color, or buy some Gobi material, the price of Gobi material is not high and oily, it is very suitable for collection, but Teacher Zhang Yang regrettably told him that in fact, there are many counterfeits of Gobi material, and he was immediately shocked! The original price is not high Gobi material, now it is also full of fakes, but also let people not have fun with Tian Yu?
In order to distinguish the authenticity of Gobi material, we need to understand how gobi material is counterfeited, generally divided into five steps, the first is to process the mountain material into a shape similar to gobi material, such as flakes, small blocks, etc.; the second step is to use carving tools to grind, create potholes on the surface, imitate the weathering pit of Gobi material; the third step is to put into a drum, imitating the handling and scouring process of the river; the fourth step is to blast the material with high pressure sandblasting, imitating the wind and sand on the Gobi Desert; the fifth step is to polish and wax the material and start selling.
The most important feature of natural Gobi material is the wind erosion pattern of the surface layer, due to the direction and strength of the wind and sand in nature, the formation of different forms, different sizes of pits, the surface is a natural smooth arc, there is no directionality to speak of, the gloss in the surface is also very consistent, but the imitation weathering pit may show obvious directionality.
Some Gobi materials look at the inside of some obvious gray and black marks, some yuyou think it is fake, in fact, it may not be a natural oxidation surface, but the imitation Gobi material does not have such a filler, and it is only possible to see the fine powder formed by processing.
Some natural Gobi materials that are not very good in shape will also be repaired like seed materials, and the places with defects such as cotton and small cracks will be repaired to form a more perfect appearance, such as this white jade Gobi material, the red circle is passive here, at a 45-degree angle to the sun, to see if the gloss and texture of this surface are consistent with other faces, you can judge.
This piece of material is more pit, it looks shiny, the crack structure seems to be no problem, look at the picture and think it is the black and blue of the Gobi material, the result is kava stone, this false level is really admirable.
Many yuyou will say that the Gobi material fraud process is also quite complicated, and the price of Gobi material is not too high, why should they be bitter? In fact, although the Gobi material is far less precious than the seed material, but now with the recognition of the Gobi material in the market, the value of the Gobi material is gradually rising, and any small yellow mouth material can sell for two or three thousand, so even if the profit is not as good as the seed material, it is also profitable, so everyone must pay attention to it when buying!