This is a very unusual and lovely Victorian pin made of Vauxhall glass (mirrored glass). The glass is molded and embossed in an elaborate pattern and it has three faceted areas that look like square stones. It is prong set in a brass setting that looks like it once had a silver finish. It fastens with a C catch.
It measures about 1 1/4 inches by about 5/8 inches and it is in very nice condition with considerable wear to the finish on the back.