Switch-It Gems Round 10mm Simulated Aquamarine Halo Ring with 12 Interchangeable Simulated Birth Months Guaranteed Authentic from the Switch It Gems designer line Metal: 925 Sterling Silver. Dimensions: Width: 14.00 mm Length: 14.00 mm SIMULATED AQUAMARINE: The Simulated Birthstone for March. The name comes from the Roman word `Aqua` for water and `Mare` for sea. Aquamarine is said to provide everlasting youth, courage, happiness and a soothing influence on relationships. All original Switch-it gems products come with a free limited Lifetime Warranty. Additional Stones: (cubic-zirconia, Shape: round-shape, Color: Colorless.)