The Large Reef ring is made of sterling silver (925). It is part of the Nostalgie collection, an ode to days spent with your feet in the sand. Inspired by the burning love for our summer vacations, this collection is both languorous and playful, capturing the very essence of teenage daydreaming, the slowness of days under the sun and the sadness of seeing them end. Sterling silver (925) is a durable metal that is well-suited for everyday use. You can wear your sterling silver jewelry in water, overnight, and during your daily activities. To avoid unintentional oxidation of your jewelry, it's recommended to avoid wearing it: 1. In a spa or chlorinated pool. 2. During household chores where you'll be in contact with chemicals, such as bleach. 3. During workouts. Avoid pressure, especially on rings, as they can become deformed.