Ross-Simons - 2.60ct t. w. Aquamarine, .20ct t. w. Diamond Earrings in 14kt White Gold. The dreamy allure of 2.60 ct. t. w. of aquamarines beckons in these shimmering stud earrings, outlined in .20 ct. t. w. of diamond rounds. Post/clutch, 14kt white gold earrings. Aquamarine birthstones are the perfect gift for March birthdays.