This vintage brooch is an unusual shape and has a large glass topaz stone, asymmetrical in shape and standing out from the base with a prong setting. The overall dimensions are about 2 1/2" x 2" and it is marked on the back "© BSK." There is some age-related discoloration in the goldtone metal, but about what you would expect from its age. The pin mechanism works well. An unusual, eye-catching brooch, which would look wonderful on an office suit.