Glass mosaic fragment
Not on view
Translucent purple and opaque white.
Flat, but one corner upturned in a straight line.
Marbled mosaic pattern in purple ground with irregular pattern of white lines and streaks.
Polished exterior; pitting of surface bubbles on exterior; dulling and iridescent weathering on interior and edges.
Possibly from a large flat dish but more probably part of a revetment plaque with a beveled side.