Royal-blue cat eye-frame glasses from MAX MARA featuring cat-eye frame, clear lenses and gold-tone hardware. All glasses from FARFETCH are sold as non-prescription frames.. A De Beers Jewellers Certificate of Authenticity accompanies all jewellery purchases. This certificate guarantees the authenticity of your De Beers Jewellers diamond jewellery; the finest quality materials and utmost care were used to craft this item to ensure its brilliance..