CZ Past Present Future Ring CZ Past Present Future Ring has a trio of CZs to celebrate your past, present, and future! Prong set center stone is a petite .75 carats, with a .25 carat CZ on either side. Trio of round cut Simulated diamond CZs sit high above a leaf cut-out pattern gallery. Thin band provides a sleek, comfortable fit! AAAAA (5A) quality CZs are the highest grade - they look very similar to real diamonds!