size - 7 - solid 925 sterling silver princess cut knife edge band solitaire engagement ring cz cubic zirconia 1.0ct. sonia jewels solid 925 sterling silver princess cut classic knife edge band solitaire wedding engagement ring highest quality cz cubic zirconia (1.0ct. center stone). this brand new ring has a dazzling high polish finish. made with the highest quality of craftsmanship and materials. solid and pure 925 sterling silver, not plated. authenticated with a 925 stamp. order this absolutely stunning ring and we are confident that you will love it when you see it.