Sterling Silver Cubic Zirconia Two-Stone Heart Promise Ring. Give this brightly polished sterling silver promise stacking ring to any loved one, a memento of how much you care with a hint of chic style. A heart-shaped and round brilliant cut cubic zirconia nestle on the top of a slim, brightly polished silver band, symbolizing the meeting of two people. Perfect for any occasion, including Valentine's Day, any holiday, a birthday, or just because, indulge in this elegant ring. Ring is available in sizes 6, 7, 8.