Classic, simple perfection. The stunning 1 ct. Round diamond solitaire held in white gold prongs at the heart of this zales signature 18k gold ring needs no accompaniment. Let it speak for you, showing her just how deeply you love and treasure her. The zales signature collectionâ® includes only the finest diamonds in the finest cuts, ensuring unrivaled, dazzling brilliance. Signature diamonds come with a certificate that includes a photo and a description of the diamond. The certificate guarantees quality and can be used for insurance purposes.