A mixed media sculpture by John McCracken, titled Untitled (Blue Rock), dated 1966.

John McCracken 

Untitled (Blue Block)

, 1966

Lacquer, fiberglass, and plywood

11 x 12 1/4 x 7 1/4 inches (27.9 x 31.1 x 18.4 cm)

A mixed media sculpture by John McCracken, titled Untitled (Blue Rock), dated 1966.