This is technically not a setting but that was how I envisioned it being used. These are brass with a nickel free bright silver plating. These come with a pin back soldered on them.  I am showing you an example in the photo of how these might be used, you don't get the cameo. You could mount it the other way if you wanted. What is good about this item is you can use it as a setting for lots of different size stones and cameos, have you ever wondered what to do with those non-standard , odd size stones ? This could be the answer. Lots of possibilities for using this item.