Sterling silver naturally tarnishes when exposed to air and other elements. There are other factors that can cause tarnish as well: some skin types, lotions, exposure to other tarnished jewelry, improper storage, etc. How your jewelry is stored can make a difference in how quickly your jewelry tarnishes. When not being worn, your jewelry should be stored in a closed jewelry box or a plastic bag. It should not be touching other jewelry, especially if the other jewelry is tarnished.
The best solution for tarnish is prevention. To prevent tarnish build-up, you should periodically polish your pendants with a polishing cloth. You can purchase one from our site, under "extras" or purchase from most jewelry supply stores. The blackened letters will not be affected by rubbing with the polishing cloth. Cleaning solutions are not recommended.