METAL: Platinum/ 18k Gold. MEASUREMENTS: Ring size - 5 1/2 (sizing balls cane be removed to increase the size) rings are 5mm and 6.8mm wide. GEMSTONES: Multi color diamonds - approx. 0.45-0.50ctw, center diamond - approx. 1.00ct. MARKED: 750, pt950. WEIGHT: 15.7 grams.Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancement, unless stated otherwise.