Brooches by Iona McCuaig Features Primary Material : silver Other Materials : copper Pin Type : double pin Dimensions (mm) : 81 x 68 x 2 One of a Kind : No Metal : white metal Hallmarked : No Cleaning InstructionsIf tarnish appears, rub pumice powder with a little water onto the silver area. Rubbing beeswax onto the brooch will help to prevent tarnish.