Silver ring: Silver and oxidized silver.
To delay oxidation keep your BFR jewelry away from moisture and water.
Always remove your jewelry before going to bed and before any strenuous activity.
Avoid spraying perfume or applying creams directly onto your jewelry.
To clean your jewelry use silver cleaner and a polishing cloth, or some lemon juice and baking soda.
When you're not wearing your jewelry, store it in a separate plastic bag.