vintage antique gold metal BROOCH ornate pendant frame jewelry pin

vintage brooch
color: antique gold

jewelry pin & necklace pendant
shaped like upside down egg
also looks like a frame.....maybe original center is missing???
gold tone metal
front looks to have been stained in an antique gold finish
has loop for use as a necklace pendant
bar pin closure (difficult to open and close)

length: 2"
width: 1.5"

good condition
brooch pin is difficult to use