Clusters, which do must not have the same periodic structure as the corresponding large crystal, can also show an optical absorption similar to the crystal. In the present article, we report the results about the preparation and optical absorption properties of glasses containing CuClxBr1-x(x=0—1) colloids. Experimental results indicate that colloidal CuCl, CuClxBr1-x and CuBr in glasses with definite size can also show exciton absorption peaks similar to the corresponding large crystals, and that glasses have the same violet absorption edges as the crystals.