Markings inside the ring are 14k rdw and 1 585. The ring has been certified by a jeweler to be genuine diamonds and gold. The diamonds are not graded, however you can see they are of an excellent quality- beautiful colour and clarity. The center diamond is a round old European cut and measures approximately 5 mm in width. This is an heirloom ring (from Germany) that sadly must be sold. Sincerely hope the new owner will treasure and enjoy as much as my great-grandmother.