Glass mosaic ribbed bowl fragment late 1st century B.C.-early 1st century A.D. Roman Rim fragment.Translucent honey brown, partially mixed with white and appearing opaque yellow, 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 in a brown ground with wavy blue and white threads in parallel lines; on exterior, part of a broad vertical rib, with flattened and tooled top.Many bubbles; polished interior; pitting of surface bubbles; dulling and creamy iridescent weathering on exterior, lip of rim, 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