This cabochon is flat, often referred to as a "buff top" in the industry. Somewhat unusual the base is a hard white plastic about 2mm in thickness. The image has been applied to the top, it appears that it has then had a clear sealer or poly coat on top. I do note that there are very small dimpling on the image. about the size of a pin points.  I think perhaps it might be a bubble in the lacquer or something like that. They all seem to have more or less of this and it is not something I can sort out. That's the way they were made and how I am selling them. These are nice though I think you'll like them.