It's a locket, and wasinspired by an ancient piece of gold jewelry. The back is flat and has a hinged door that opens. You can put a stone in it--up to a 5mm stone. A tiny ruby adorns the bottom point of the amulet.
This piece measures 1" high (excluding the bail) and just shy of 1/4" wide. You may choose the stone to be inserted, but please call for pricing if you would like a precious gem, as the price will vary.