IGI Certified 0.23cttw Round Diamond 4-Prong Stud Earrings in White Gold with Screw Backs (E-F, I1-I2) Made in USA IGI-certified jewelry has been assessed and authenticated by the International Gemological Institute's expert gemologists. This product comes with a Luxurious Cherrywood Gift Box. All our diamond suppliers certify that to their best knowledge, all diamonds are conflict free and 100% in compliance with the Kimberly Code of Conduct. All our gold items are responsibly sourced and the majority is made from environmentally processed recycled gold.