This is a flat backed semi-precious gemstone cabochon. They are domed on top. These are natural stones hand cut in a lapidary shop. We've taken a picture of one piece but due to the nature of the item your going to get some variation from piece to piece. Natural stones like black onyx will be quite consistent but many agates and jaspers will very greatly in terms of color and stratification. Of course is what makes them so unique and attractive Please pay attention to the size of the item. We offer the same stones in a lot of sizes and it is easy to get the wrong size as the pictures all look similar. Size is listed in the product title in millimeters (mm) 40x30mm Green Agate Flat Backed Loose Gemstone Cabochon 859x
