Aquamarine & Diamond Earrings in Platinum and 14kAquamarine Diamond Earrings in Platinum and 14k. These drop earrings feature aquamarines and diamonds set in platinum and 14 karat white gold. Each aquamarine weighs 5. 54 carats and look beautiful with the added flash of diamonds and the movement you get from the elegant drop setting. A bold and stylish look fit for a fancy evening event, these will be favorites in just about any jewelry collection.