Diamonds are the hardest known substances on earth. With the proper care, they can last a lifetime and can even be handed down as heirlooms to future generations without losing any of their luster. But they can still be scratched, chipped or dulled if not handled correctly. So here are some tips that will help preserve the life and beauty of your diamond:

A diamond can scratch another diamond, as well as other jewelry pieces, so store diamond items separately. If you need to store diamond items together, make sure they aren’t tangled together so they won’t scratch one another. Diamond jewelry pieces are best stored in a fabric-lined jewel case or in a box with compartments or dividers.

Never wear diamond jewelry while doing heavy work. Even though a diamond is extremely durable, it can be chipped by a hard blow, and even everyday activity can loosen a setting.

Don’t let your diamonds come in contact with chlorine bleach or other chemicals because they can pit or discolor the mounting.

Clean your diamonds regularly. If using a commercial jewelry cleaner, use a brand name and follow the instructions on the label. You can also soak your diamond jewelry in a small bowl of warm, soapy water made with any mild liquid detergent. Gently brush the piece with a soft toothbrush while it is in the suds to dislodge any dust or dirt from under the setting. Then, rinse under warm running water. Pat dry with a soft, lint-free cloth. And remember to always put a stopper in your sink! Another cleaning option would be a half-and-half solution of household ammonia and cold water. Place your jewelry in a small bowl of the mix for 30 minutes. Lift out and gently tap around the front and back of the mounting with a small soft toothbrush. Swish in the solution a second time, then rinse and drain on tissue paper. Finally, you can clean your diamonds by soaking them in a glass of vodka.

If your diamond has been treated or altered in any way, it may need special attention and care. Diamonds can be colored, tinted, coated, irradiated or heated to improve their appearance. Inclusions are sometimes removed with lasers, while fractures are filled with a glasslike compound. Some of these procedures are not permanent - for instance, the epoxies used in fracture-filled diamonds can melt away if the stone is heated. Ask a jeweler you trust to let you know if your diamond’s natural appearance has been altered and to advise you of any special care procedures.

Take your diamond jewelry to a jeweler every six months to have it professionally cleaned and to have it checked for loose or bent prongs and wear.