Definition: Toning is a term to describe the tarnish or light patina that forms on the surface of the metal due to exposure to environmental agents or toxins.
Warning: If you have toned coins, don't try to clean them! Please see Top 7 Ways to Ruin Your Coins.
Warning: If you have toned coins, don't try to clean them! Please see Top 7 Ways to Ruin Your Coins.
Also Known As: tarnish
Examples:
Sometimes, silver coins develop an incredibly beautiful, and highly sought after, rainbow toning.