Vintage 925 silver Art Deco brooch pin with black inserts

Vintage Art Deco (or Art Deco style) brooch pin. 2.5" long. Stamped 925 on the back. In excellent vintage condition, just with some patina on the front and back panels. The design imitates marcasite stones all around, but these are actually made of metal. The black round inserts look like either enamel, or epoxy. This brooch is slightly magnetic, so even though it is stamped 925, I can't guarantee that all parts (they are all soldered together) are made of 925 sterling silver.