Sapphires and rubies are the hardest precious gemstones aside from diamonds; they will stand up to everyday abuse that would damage most other gems. This durability has made them popular accent stones on diamond rings and a common alternative to diamonds as a center stone. Both sapphires and rubies are types of a mineral called corundum; the only difference between them is only a ruby is red while sapphires come in a variety of colors. Though they are durable, some care can help your sapphire and ruby jewelry last a lifetime. Caring for Ruby/Sapphire Jewelry: - When cleaning your sapphire jewelry, be sure to use jewelry cleaner that does not contain any harsh chemicals that could harm either your gemstone or the setting. - A toothbrush can be used to remove any buildup. Due to their durability, sapphires and rubies are safe for ultrasonic cleaners. - Sapphires and rubies are harder than gold, silver, and platinum, so if they are stored improperly they will scratch your other jewelry. Everyday Tips: - It is best to remove your sapphire and ruby jewelry before working with your hands- though they are strong, it is still possible to chip or damage the gem. - Avoid detergents containing moisturizers, abrasive cleaners or bleach.