It is not good jade, white wadding is called "cotton", with cotton thread, cotton spot, cotton spot and so on. It's a jade defect. Jade bracelets with cotton, the value of the cotton will be reduced. However, if you carefully like this thing in jade, it must be judged according to personal preference. When selecting a bracelet, the first thing is to carefully observe whether the jade bracelet has cracks, to make a comprehensive observation of the front, back, inside and outside of each jade bracelet, because the serious cracks are the fatal injury of the jade bracelet. Secondly, it is necessary to pay attention to whether the shape of the jade bracelet is round, whether the thickness of the strip diameter is uniform, and whether the polishing is satisfactory. Again, it is necessary to pay attention to whether the size of the mouth of the jade bracelet and the thickness of the strip diameter meet the needs. Finally, a good jade bracelet should be "colored." "Kind" refers to the delicate crystal and transparency of jade, and "color" mainly refers to emerald green. In general, we should firmly remember the following four phrases: first check the crack to prevent death, defects to be less work to fine, the size does not match the difficult transaction, "there is a colored" boutique. The following introduces some common methods for identifying true and false jade bracelets: 1, water identification method: a drop of water on jade, if it becomes dewlike, it is true jade for a long time. 2, hand touch method: if it is true jade, touch with the hand has the feeling of cold lubrication. 3, observation method: the jade is observed in the light, the color is clear, and the green is evenly distributed. 4, tongue tip identification: tongue tip licking real jade has astringent feeling, while false jade has no. Reference: Jade bracelet - Encyclopedia