Vintage Edwardian Diamond Navette Ring in Yellow Gold & PlatinumVintage Edwardian Diamond Navette Ring in Yellow Gold Platinum. This original Vintage Edwardian ring features three rose cut diamonds set north to south. The center stone weights . 25 carats and has a unique greyish color. Two (2) additional rose cut diamonds sit on each side of the center stone with beautiful negative space adding to the design. The top half of the ring is finished in platinum while the bottom is in yellow gold.