Sometimes we don't see the crack in the South Red Agate. It may be that you have met a perfect Nanhong. It may be that the crack is too small, or the seller may hide the crack. For South Red's split players can be tolerant, but if the merchant deliberately concealed it is another matter. Some merchants will inject glue in order to cover the cracks, but the glue will have a fluorescent reaction when irradiated with violet light, which is better to identify. Therefore, some merchants who look at some but relatively small cracks will use oil bubbles to cover it. This method is difficult to find in a short period of time if the buyer does not have any experience. It took a long time, and when it slowly evaporated, it was discovered that the South Red Agate had cracks. Wooden Wine Box,Custom Sized Cardboard Boxes,Flat Pack Gift Boxes,Wine Shipping Boxes Shenzhen Yi Ding Peng Packaging Design Co., Ltd. , https://www.ydppackaging.com