METAL: 18k Gold. MEASUREMENTS: Ring size - 4 3/4, ring top is 20mm x 30mm. GEMSTONES: White and black diamonds - 2.24ctw, Moonstone - 12.98ct. MARKED: D2.24, 12.98, Suarez, 18k, 750. WEIGHT: 25.7 grams.Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancement, unless stated otherwise.