Glass mosaic ribbed bowl fragment late 1st century B.C.-early 1st century A.D. Roman Body fragment.Translucent turquoise blue, deep purple appearing black, and opaque white.Almost straight side.Composite mosaic pattern formed from polygonal sections of a single cane in a blue ground with white rods forming splashes and occasional purple rods; on exterior, part of a single thick and broad vertical rib with rounded profile.Polished exterior; pitting and some weathering of surface bubbles on exterior; dulling, pitting, and faint weathering on interior and jagged edges.. Glass mosaic ribbed bowl fragment. Roman. late 1st century B.C.-early 1st century A.D.. Glass; cast and tooled. Early Imperial. Glass