I believe I purchased these seashell coasters in the Philippines around 2017. Because they are made of seashells, the appearance changes depending on the lighting, making them difficult to photograph. I think the top coaster in the second photo best represents their look. If you'd like, I can retake photos, so please feel free to ask. The surface has been processed after the shells were applied, so the mosaic shell sections are not bumpy. However, as they are handmade, please understand that there may be slight differences between the two coasters. Diameter: 10cm, Thickness: 8mm