Glass mosaic base fragment late 1st century B.C.-early 1st century A.D. Roman Solid base ring and thin-walled bottom fragment, probably from a carinated bowl.Translucent light blue appearing semi-opaque greyish green, deep purple appearing black, opaque white and red; base ring in green.Flat bottom, slanting inward; applied outsplayed base ring with edge ground flat.Composite mosaic pattern formed from polygonal sections of a single cane in a green ground surrounding a hollow band in a purple ground filled with a circle of white dots, and a central white rod within a red circle. Polished interior; pitting of surface bubbles on interior; dulling and creamy brown weathering on exterior, jagged edges, and all of base ring.. Glass mosaic base fragment. Roman. late 1st century B.C.-early 1st century A.D.. Glass; cast. Early Imperial. Glass