METAL; 18k Gold/ Platinum. MEASUREMENTS: Ring size - 3.5 (suizing balls can be removed to increase the size). Center will fit approx. 9.6mm x 9.7mm stone. GEMSTONES: Diamonds approx. 1.35ctw. MARKED: 18k plat, 1.35. WEIGHT: 8.5 grams.Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancement, unless stated otherwise.