IGI-Certified 14k Gold Princess-Cut Diamond Stud Earrings (1/2 cttw, H-I Color, I1 Clarity) Classic stud earring in 14k gold with pretty princess-cut diamond and screw backing for added security IGI-certified jewelry has been assessed and authenticated by the International Gemological Institute's expert gemologists. All our diamond suppliers confirm that they comply with the Kimberley Process to ensure that their diamonds are conflict free. Domestic Carat weight listed is the total for both studs.