METAL: 18k Gold. MEASUREMENTS: Ring size - 6 1/4, ring top is 9.6mm in diameter, center will fit approx. 5.8mm stone. GEMSTONES: Diamonds approx. 0.23ctw. MARKED: 18k. WEIGHT: 3.7 grams.Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancement, unless stated otherwise.