This precious collection halo oval shaped topaz engagement ring is splendid in any outfit. Engineered with 148 round diamonds weighing 1. 00 carats, and 1 oval topaz with a significant weight of 5. 42 carats in a charming finish. Additional Information: 148 round diamonds weighing 1. 00 carats, and 1 oval topaz with a significant weight of 5. 42 carats.