Rivière Custom 18kt Oval Diamond Ring and Eternity Band Set. An exquisite custom wedding band set in beautiful 18kt rose gold. The 4-prong set center stone is a GIA certified 1.52ct oval cut diamond, accented by three rows of sparkling round pavè diamonds. This enchanting oval cut ring is perfectly paired with matching 18kt rose gold eternity band. This lovely wedding band set is sized to 7.