The material used to make these rings is a very unique type of bronze alloy, which our silversmiths create by melting down Antique Indonesian coins and repurposing them into new bronze. Like all bronze, these pieces will lose their shine over time, and should be regularly polished if you want to keep them tarnish-free, gold and shiny. All of our bronze pieces can be rubbed with a smooth cloth, washed with soap nut or rubbed with coconut oil.