Opaque white (opal) over colorless on transparent deep red glass; blown, cased (twice), acid-dipped, carved, ground, and polished. Plaque: circular. Rim rounded; side tapers to narrow, flat base defined by shallow groove. Decorated with a figured scene showing, at center, the goddess Aphrodite who, according to Greek mythology, was born by rising naked from the sea, then rode to land on a scallop shell. She is surrounded by attendants. Eros flies behind her brandishing a bow and arrow. The figures in front of her are cupids riding on dolphins, those on our left are a sea nymph and a hippocamp (a mythical creature with the head and forequarters of a horse and the tail of a dolphin), and those on our right are another sea nymph and a triton. Behind the goddess's shell is a second triton blowing on a conch-shell. (Tritons are demigods with the head and torso of a man and a fish's tail.)