Because these rings are made from sterling silver, they are subject to tarnish. You can help keep tarnish away by holding and wearing the ring frequently, since body oils can remove light tarnish and prevent new tarnish from forming. Also, store the ring in an airtight spot, such as a ziplock bag, when you are not wearing it. Clean it regularly with water mixed with a mild dish washing detergent and a clean cotton cloth. Do not use paper towels, which are too rough and can actually scratch the silver or the mood stone. Do NOT Leave ring immersed in any liquid for any period of time. To remove stubborn tarnish, a silver polishing cloth can be used to lightly buff the band.