This ring is made with a magnificent cluster of green apatite and 100% sterling silver. Green apatite is a crystal with a calming energy. It helps to sooth tension and nerves so one can focus on what is important according to the heart and remain grounded and balanced. Relax Restore, and Revitalize. Green Apatite harmonizes with the elements of Water and Earth. US Size 6-6.5 Note: This ring is big and beautiful and a wonderful piece to show off! However, apatite is a little softer than most crystals and is not intended for any rough play .