Antique Victorian Banded Agate Engaved Frame Brooch Laye 1800's

1 3/4 inch gold plated and agate Victorian brooch. Oval gold plated frame engraved with scrolls. Banded agate stone in dark browns and white with a beveled edge. The lines on the stone reminiscent of waves on the beach. T-bar pin and simple c-clasp. Slight blemish on the back, see pic, doesn't show on front or affect wear. Beautiful collar brooch. In very good antique condition. Slight wear to plate. Late 1800's. Please message me with any questions.