This is an interesting Coro brooch pin. It has a large emerald green glass stone that is open at the back. The stone hangs from the main pin which is a gold tone metal and looks like 3 double half loops. It is very pretty and in very nice pre-owned condition. This has a very granny core vibe but I believe this is an 80's piece. It is 2.5" long and 1.25" wide at the top. Great collector piece.