Aquamarine, Diamond, 18k Yellow Gold Necklace. Featuring one oval shaped aquamarine cabochon measuring approximately 17 x 12.9 mm, accented by round-cut diamonds weighing a total of approximately 0.70 cttw., set in an 18k yellow gold mounting measuring approximately 22 x 16 mm, suspended from an 18k yellow gold chain, forming a 20 inch necklace. {Gross Weight: 4.2 dwts}