The image shows a small stone net sinker in a glass display case. The stone is round and appears to be made of a light-colored material, possibly stone, with a rough texture. It is resting on a white surface, and there is a small metal hook on the right side of the display case, which is likely used to hold the stone in place. The text on the image is written in Chinese characters, which translates to "Stone net sinkers" in English.