Glass mosaic ribbed bowl fragment late 1st century B.C.-early 1st century A.D. Roman Rim fragment.Translucent honey brown, cobalt blue, and opaque white.Slightly everted rim with rounded inner lip; at top, side tapering downward, then bulging outward with convex curving profile.Ribbon mosaic pattern formed from lengths of one or more canes in a brown ground with wavy white and blue threads in parallel lines; on exterior, two vertical slender ribs, with flattened tops and rounded outer edges, tapering downward.Polished exterior; pitting of surface bubbles on exterior; dulling and creamy iridescent weathering on interior, rim, and jagged edges; one edge ground flat.Part of the rim and side of a deep ribbed bowl.. Glass mosaic ribbed bowl fragment. Roman. late 1st century B.C.-early 1st century A.D.. Glass; cast and tooled. Early Imperial. Glass