Glass mosaic bowl fragment late 1st century B.C.-early 1st century A.D. Roman Rim fragment of shallow bowl.Translucent purple, opaque white and yellow.Vertical, rounded rim; side curving in sharply.Mosaic pattern formed from polygonal sections of two canes: one in a purple ground containing a circle in white and a white rod at center, and the other in a purple ground with a yellow spiral; both appearing as streaks on exterior.Polished exterior; pitting of surface bubbles and some weathering; dulling, pitting, and iridescent weathering on interior, rim, and edges.. Glass mosaic bowl fragment. Roman. late 1st century B.C.-early 1st century A.D.. Glass; cast. Early Imperial. Glass