Celtic Triquetra Knotwork Crescent Moon Sterling Silver Ring, Size 7 .925 Sterling Silver, Created by Artisans only for the Peter Stone Co. The Sterling Silver Triquetra Crescent Moon Ring is a powerful symbol of unity, protection, and spiritual growth. Combining the ancient Celtic triquetra with the mystical crescent moon, this ring offers a blend of energies that promote balance, intuition, and connection to the divine.