ROBERTO COIN 18k gold stud earrings. ROBERTO COIN aquamarine Stud Earrings. Beautiful 18k yellow gold four prong setting. Post back setting for pierced earrings.Roberto Coin signature hallmarks stamped on each earring including 0.3ct ruby. The item "NEW $800 ROBERTO COIN 18k Yellow Gold Round Cut Blue Aquamarine Stud Earrings" is in sale since Monday, October 1, 2018. This item is in the category "Jewelry & Watches\Fine Jewelry\Fine Earrings\Gemstone". The seller is "teddymaximus" and is located in Playa del Rey, California. This item can be shipped to United States.