Mirror with design of concentric circles

The image shows an ancient bronze mirror with a design of concentric circles. The mirror is circular and flat with a raised rim around the edge. The mirror has three concentric raised circles in the center. The smallest circle is a raised dot in the very center. The surface of the mirror is dark with areas of green patina. The mirror sits on a gray gradient background with a shadow beneath it. The overall color of the mirror is dark gray and black with green spots. The mirror appears old and weathered.