Colorless, opaque white, translucent gray, translucent pale green, and translucent to transparent whitish opalescent (possibly colorless with opalescent surface); laminated sheet glass, blown, cut, ground and polished. Sculpture: spheroid, but with form modified to make square shoulder and somewhat angular, ribbed junction of sections of wall below each angle. Rim tapers to flat top which is ground but not polished; stepped shoulder; wall descends with convex profile and then curves in toward bottom; base plain with low kick. Laminated glass has five more or less horizontal layers of unequal thickness: (from top to bottom) colorless (thin), white, gray (thin), pale green (thicker), and opalescent (very thick: more than half total height). Signature engraved on underside of base: "Patti 76" (name cursive).