Untitled , by marcelle cahn , 1970 , abstract , Concretism style , Envelope, Paper product
a piece of artwork that has a yellow envelope on it
 an abstract painting. The background is white. In the center of the painting is a diamond shape. The diamond is yellow. The middle of the diamond is gray. The envelope is yellow and has two bubbles on it. The bubble on the bottom right corner is blue. There are red lines on the diamond.