Authentic Pandora Sparkling Cubic Zirconia Hearts Sterling Silver Stacking Ring USA Stockist Online. Vast Collection of Pandora Jewelry Clearance Sale. Buy Now! Let your love be known with this sparkling Heart Ring, the perfect gift for your loved one this Valentine's Day. Crafted from polished sterling silver, the band is designed in the form of connected love hearts, each set with a dazzling cubic zirconia stone that will leave a twinkle in the eye your special someone.