Cook 1/2 cup sugar and 2 tablespoons water in heavy small saucepan over low heat, stirring until sugar dissolves.
Transfer to top of double boiler.
Cover berry mixture and place over simmering water.
Cook 45 minutes, stirring occasionally.
Let cranberry mixture stand at room temperature overnight.
Place remaining 1/2 cup sugar on plate.
Add the sugar and turn to coat.
Let dry at least 30 minutes.
(Can be prepared 3 days ahead. Cover and refrigerate.)