De Beers Consolidated Mines injects a little color into its advertising for the first time with this TV spot breaking this week in 30- and 45-second versions. The ad, created by J. Walter Thompson USA, New York, shows a thirtysomething couple in an empty movie theater when the man surprises the woman with their wedding video on the big screen and a three-diamond anniversary ring from his pocket. The voice-over: "For your past, for your present, for the next thousand years. A diamond is forever. De Beers."