.925 Sterling Silver. This beauty goes from brunch to the after party, this ring will get you there in style! 14 karat gold plated sterling silver reversible ring features black onyx with a black CZ center on one side and mother of pearl with a white CZ center on the other. Mother of pearl and black onyx are 15.5mm in diameter, round black CZ is 1.5mm in diameter and square white CZ is 2mm diameter. Available in whole sizes 6-9.