Sterling Silver Cubic Zirconia Three-Stone Engagement, Anniversary, Promise Ring. Add romance to your special moment with this exquisite sterling silver engagement or promise anniversary ring, created in brightly polished sterling silver. A round brilliant cut and two smaller cubic zirconia stones on the top of the slim band give this classic ring a three-stone style, celebrating the past, present, and future in timeless elegance.  Ring sizes available: 6,7,8.