Diamonds are the hardest natural substance on earth. A diamond can cut any kind of rock or metal, but can only be cut by another diamonds. A diamond is virtually indestructible - it can be heated to a temperature of 1292 degrees Farenheit before it will burn, and yet the oil from the touch of a human finger can cause dirt to collect on the diamond and dull its sparkle.

The GIA offers the following advice for taking care of your diamond:

Regular Cleaning

Clean your diamond regularly. A simple method is to soak the diamond in an ammonia-based household cleaner overnight, then brush it with a soft clean toothbrush to remove the remaining dirt.

Most dirt collects on the back of the diamond, so make sure to brush this section carefully and thoroughly.

Never use chlorine or abrasives to clean your diamond as this can erode the metal in which the diamond has been set.

Ultrasonic Cleaner

Ultrasonic cleaning is sometimes needed to remove encrusted dirt on diamonds. This method uses high frequency sound waves to remove collected dirt and oils.

Ultrasonic cleaning should only be performed by a professional jeweler as the vibrations can cause the diamond to loosen from the stone.