This brooch has been designed with an eyecatching "domed" or convex shape that showcases the stones to best advantage. Large round rich ruby red stones are in the center and border. The center stone measures a full 3/8 inch in diameter. The other stones are marquis shaped and rounds. All stones are prong set, intact, and quite sparkly. The back is closed and the clasp works well. The overall diameter of the brooch at widest point is 2 1/8 inches. According to my research, the piece probably dates from the 1930's.It is in excellent vintage condition and would be a nice addition to a collection as well as being a very wearable piece.