Glass ribbed bowl late 1st century B.C.-early 1st century A.D. Roman Translucent pale blue green.Vertical rounded rim; deep sides with plain band around top, curving in to slightly concave bottom.On interior, one wide horizontal groove below rim, and two narrow, close-set grooves cut in a band around lower body; on exterior, thirty-eight shallow and slightly slanting ribs, tapering downwards and extending to edge of bottom.Intact, but some internal cracks; pinprick bubbles; dulling, deep pitting, and iridescence, with patches of thick creamy weathering.Rotary grinding marks on interior and on plain band around top of sides.. Glass ribbed bowl. Roman. late 1st century B.C.-early 1st century A.D.. Glass; cast, tooled, and cut. Early Imperial, Augustan or Julio-Claudian. Glass