An effective method for cleaning diamond jewelry is with warm water, mild soap and a soft toothbrush.  Use the toothbrush with a tapping motion.  Be sure to rinse off all of the soap residue. (If cleaning your diamond jewelry over a sink be sure to block the drain. There is nothing worse than having to call a plumber to fish out your jewelry from the drain pipe).
A water pik is a wonderful alternative to a soft toothbrush. Be sure to clean/spray underneath the diamond as well – that is where most of the gunk will collect.
Take your jewelry to a jewelry store – they will be happy to clean your jewelry while you browse the store. Even if you clean your jewelry at home at least twice a year you should have your jewelry examined by a professional jeweler to check for damage and loose prongs. Some jewelry store warranties require this, so be sure to follow any warranty guidelines.
If all else fails – bottoms up…….soak your jewelry in straight vodka – the brand of your choice
Diamonds are the hardest gemstone, which means that diamonds will scratch diamonds and other gemstones. To prevent damage to your jewelry, diamond jewelry should be stored in separate compartments of your jewelry box. Each piece can also be wrapped in tissue or put into a small plastic baggie.
Diamonds in rings, bracelets and cuff-links are more exposed to the wear and tear of everyday life. Diamonds should never be worn during extreme activities or rough work (avoid wearing your jewelry during activities such as gardening, construction work, tennis, squash, basketball, baseball, swimming, water polo etc).
Nothing is more beautiful than a well cut, clean, sparkling diamond. NEVER use bleach to clean jewelry or any cleaner that contains chlorine. Chlorine will pit gold. Never go swimming in a chlorine treated pool with your jewelry.