Mirror with dragons and knob-and-swirl design

Round, flat object with a green patina. The object has a circular shape with a raised knob in the center. There are two concentric circles of small bumps around the knob. The inner circle has a design of interconnected swirls and floral motifs. The outer circle has a similar design, featuring dragon-like creatures. The edge of the object has a series of rounded scallops. The green patina is visible throughout, with some areas appearing more weathered than others. The background is a gradient from dark gray at the top to light gray at the bottom. The object casts a shadow on the surface below it. The title of the object is "Mirror with dragons and knob-and-swirl design". The artist is unknown.