Glass mosaic ribbed bowl fragment late 1st century B.C.-early 1st century A.D. Roman Rim fragment.Translucent deep honey brown, cobalt blue, and opaque white.Outsplayed rim with rounded lip; slightly convex curving side tapering downward.Ribbon mosaic pattern formed from lengths of one or more canes with wavy blue, white, and brown threads, some in parallel lines; on exterior, parts of three slanting ribs, with flattened and tooled tops.Some bubbles; polished interior; pitting of surface bubbles and weathering of linear scratches on interior; dulling and creamy iridescent weathering on exterior 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