In the process of making jade, because of the reason of jade material or improper processing, there are often some defects. Therefore, when purchasing, we must understand what defects are there and make sure that we have a good idea. Here are some common defects and analysis of their causes. 1. Dameng: The finished jade is dull or dull. This condition is called Dameng. Big Mundo is caused by insufficient polishing or no polishing. In addition, the lack of polishing can also be called "Mongo", this phenomenon is relatively light. 2. Bubble impurities: Refers to bubbles or impurities inside the jade, which is caused by the impure texture of the jade itself or the processing. 3. Cracked stone: The jade structure is collapsed, cracked and rotten. The cause of the jade is that the explosive is shattered and the jade structure is mined during mining, or it is caused by improper billet and grindstone during the processing. 4. Improper size: Jade has strict requirements on the size, the error is within 0.05mm, and the size is small or small. 5. Shovel edge: The left side of the jade is clearly visible, and the sharpness is extremely sharp. Mostly caused by improper turning or excessive rims. 6. Sand boundary: The spot on the surface of the jade is a bit of a spot, also called pitting, which is mostly caused by poor polishing. 7. Loss of round: The jade shape should be round, and the shape is not standard. The jade is not good, and the processing ratio may be wrong. 8. Sub-board: Jade should be a whole. In the case of improper operation, jade can appear several separate parts, called analysis. Color Glaze Mugs,Ceramic Dinner Set,Tea Cup Porcelain,Reactive Glaze Ceramic HANDAN OURAY I/E CO., LTD , https://www.ourayceramicware.com