4 Carat Pear Cut Aquamarine Ring w/ Diamonds in 14k4 Carat Pear Cut Aquamarine Ring w Diamonds in 14k. This elegant Mid Century cocktail ring features a 4. 47 carat pear shaped aquamarine set in 14 karat yellow gold. Accented by two small round brilliant cut diamonds, this beautiful tear drop aquamarine is held by five (5) prongs. The greyish blue color of the aqua contrasts beautifully with the yellow gold mounting and completes this elegant statement ring.