Star K Sterling Silver 8mm Heart Shape Promise Engagement Ring. Metal: 925 Sterling Silver. Dimensions: Width: 8.00 This beautiful design is part of the exclusive Star K. Jewelry collection. Star K, is a reputable American Family Business based in New York since 1986, uses only the highest quality materials, and will proudly stand behind all of her products. 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. Additional Stones: (cubic-zirconia, Shape: round-shape, Color: Colorless.)