Don't panic, the ring is solid sterling silver (92.5% Silver). 1 in 70 people get a "green finger effect" due to the acidity in their skin (sweat) reacting with the alloy in sterling silver. Often, mass-produced silver jewelry is industrial plated with rhodium (same metals family as platinum). Hand crafted silver rings usually are not rhodium plated.
If you are having this reaction, we are happy to plate your ring with rhodium. For almost all of our rings, we offer this service for free, but there are a few rings that will require an additional fee for the plating, due to the complexity of the ring, such as the Engagement Ring of Aragorn and Arwen. Please feel free to contact us to see if your ring would require an additional fee. Just send the ring back with a copy of your sales receipt and a note that you need the ring rhodium plated. NOTE: We suggest insuring the package for the value of the ring. We will not replace or refund rings lost or stolen in the mail while in delivery from you to us.
Another solution is to simply clean the ring every day with a silver polishing cloth. They can be found at local jewelry stores or department store jewelry counters. After about a week or two, the reaction should stop occurring.