Sterling Silver Cubic Zirconia Solitaire Promise Ring. This beautiful promise ring is the perfect symbol of your love and commitment. Crafted in sterling silver, the ring features a round cubic zirconia solitaire held in a four claw setting as its sparkling centrepiece. Buy as a pre-engagement ring or as an expression of your enduring relationship. Fields is supporting Make-A-Wish in 2022. A percentage of all non-branded silver jewellery sales during this period will be donated to Make-a-Wish.