5 Carat Mid-Century Oval Cut Aquamarine Ring in 14k White Gold5 Carat Mid Century Oval Cut Aquamarine Ring in 14k White Gold. This Mid Century cocktail ring features a 4. 99 carat oval cut aquamarine in dazzling 14 karat white gold. The aquamarine has a lightly saturated, soft blue hue. Accenting its already generous size, the oval cut facets give the blue aquamarine a powerful brilliance. The center stone is prong set on a beautiful, vintage basket mounting. The shoulders of the band feature structured, Mid