Vintage black onyx hearts and marcasite sterling silver pin brooch

This is a vintage pin brooch in excellent pre owned condition showing a few signs of moderate gentle use.   Black onyx stone hearts set in authentic 925 sterling silver surrounded with marcasite accent stones. Three hearts dangling from an open bar design. Hinge and closure are all in perfect functional condition. I believe the pin itself is sterling silver too. Total weight is 7.51 grams. 80’s era. Stamped 925 FAS. Reasonable offers considered