Diamonds may be forever, but they still get dirty. Keep your diamond jewelry sparkling new by treating it to a good cleaning now and then.
Ammonia soak: Mix half a cup of cold water wit half a cup of household ammonia and put it in a teacup. Soak your diamond pieces in the mixture for half an hour. Then very gentle scrub with a soft toothbrush. Give them one more rinse through the mixture and let them dry on a soft cloth.
Detergent bath: Swish some dishwashing liquid into warm water in a teacup and carefully drop your jewelry into it. After soaking for half an hour, scrub gently with a soft toothbrush. Then rinse thoroughly with clear water and let your diamonds dry on a soft cloth.
Ultrasonic cleaning: You can buy one of these jewelry-cleaning devices or have a jeweler use one. High-frequency waves pass through water and agitate the grime off your jewels, kind of like a pressure wash for diamonds.