METAL: 18k Gold. MEASUREMENTS: Ring size - 6 3/4, ring is 9mm wide. Middle section of the ring rotates. GEMSTONES: 1 diamond, enamel. MARKED: 54, Germany, Wellendorf, 750. Comes with box. WEIGHT: 16.1 grams.Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancement, unless stated otherwise.