Antique 14K Yellow Gold Carved Shell Cameo Oval Brooch ETC8636

This is an antique 14K yellow gold cameo brooch. The cameo is carved from shell. It has 3 small hairline cracks on the right side. These are clear in the close-up pictures. This is a convertible pendant brooch piece. The pin back is secure. The bale is 4mm wide. The brooch measures 1 1/2" x 1 1/8". The back of the bezel is stamped 585, 66, NA. Total weight is 3.4dwt.
This is an antique, previously owned brooch. Therefore, light wear can be expected.