Pay special attention to the following phenomena in trading.
Cut large pieces of material into small holes.
In a large piece of jade raw material, cut out some small mouths, and you can see green from mouth to mouth. Be especially careful. This shows that jade material is general and belongs to low-priced brick material.
The opening is not polished.
The broken lines, paving lines, grinding marks and cutting marks on jade materials are all green, but they are not polished, so be especially careful. This kind of jade often has many cracks, the bottom is gray, blue is not straight, the water quality is not good, or blue-black, and the impurities are too heavy, so we have to keep the original cut as a cover without polishing.
More green is questionable.
There are many small green windows on a piece of jade, so buyers should be more careful, especially high-grade jade. We should consider: since there are so many green windows, why not connect these small windows and sell them at a good price after expanding the green? In fact, when sellers are looking for green, they often leave a lot of scratches. These marks are mostly green places on jade materials. Buyers should find these traces as long as they pay attention.
Watch out for big chunks of water.
Sellers sometimes cut a small piece of jade from the big material, but only show the big material, not the small piece. In contrast, the buyer should pay attention to the fact that the green color between two pieces of materials may change in a bad direction, so the seller will not show the buyer the small pieces of materials with deteriorated color. Before buying, the seller must study the cutting parts. It is necessary to combine the two pieces and carefully observe whether it is possible for green to extend to a large piece of jade.
Be careful of large green areas.
Pay attention to the large piece of green seen on the wool cut. There is a folk jargon called "it is better to buy a large film (referring to green) than to buy a thread". Because a large area of green is often caused by the seller cutting a knife along the green direction, that is, parallel to the green direction. This knife turns a line of green into a large green, and the thickness of green is only a thin layer. If the buyer does not pay attention at this time, he will be cheated.
Pay attention to poor quality and good setting quality.
Many sellers will cut off the materials that are not easy to sell, and then stick them together again to sell them, so as to shoddy them. Therefore, buyers must be alert to whether the original stone has bonded joints when inspecting materials. If necessary, the jade material can be sprinkled with water or soaked in water to observe whether there are bubbles coming out or cracking.
Surface features should be carefully checked.
Emerald raw hide has many characteristics such as ringworm and pine blossom. These features may indicate that there is green inside the wool, but we should also be careful that illegal traders forge these features. If it is just a simple blind correspondence, it may be cheated.
The depth of water color is the most important.
When buying green raw materials, it is necessary to master the influence of water quality on the finished product, otherwise it is difficult to protect the cost. If the light can enter the raw material within a few millimeters, the green color is good and very transparent, crystal clear and beautiful, then this material can not be a high-grade torus; Or make a ring, it will be light green or even colorless. Generally speaking, at noon, it is better for the sun to shine into the interior of jadeite jade cut between 6- 13mm, and the water color of the finished product can be cut and adjusted according to the thickness of raw materials.