GUTTA PERCHA Carved Cathedral or Church with a Moat Circle Pin with Pale Yellow Stones is a very unusual design. Carved on the inside of the circle with turrets and walls, it might even be a fortress. One of the yellow stones is slightly smaller than the rest and is most likely a replacement. It measures approximately 1 1/2 inches round. The back pin needs a bit of a tightening, but with old pieces like this, I will leave that up to the new owner to repair.