Here is a $2,500 set of 1.60Ct Aquamarine Double Buttercup Earrings in yellow gold. This set is part of a collection of estate jewelry that will be auctioned this week. The centers are pretty blue 6.00mm Aquamarines that were just confirmed natural by the gem lab today. They are set high in a double buttercup setting with screwbacks. Aquamarine is the March birthstone. This set of Aquamarine Buttercup Stud Earrings are not marked- but test 10k- they have a retail replacement cost of $2,500 and they will be auctioned to the highest bidder at $1 No Reserve.