Clean your diamond jewelry regularly at home in an ultrasonic cleaner or by hand. To make your own jewelry cleaning solution, mix one part ammonia to six parts water.
Gently scrub the diamond piece with a small soft toothbrush to loosen dirt and restore the diamond's brilliance. Be careful not to scratch the metal setting. Always rinse after cleaning.
Like gold, platinum jewelry does not tarnish.
Simply clean your platinum pieces with a soft cloth and mild detergent or ammonia solution (one part ammonia to six parts water) to maintain their luster.