Chal·co·lith·ic 
(kăl′kə-lĭthĭk)
(kăl′kə-lĭthĭk)adj.
Of or relating to the period of human culture preliminary to the Bronze Age, characterized by the use of copper and stone tools.
n.
The Chalcolithic Period. Also called Copper and Stone Age. See Usage Note at Three Age system.
[Greek khalkos, copper + -LITH + -IC.]