METAL: 18k Gold. MEASUREMENTS: Ring size - 5 3/4, ring top - 21mm x 20mm. Center will fit approx. 8.8mm x 6.8mm stone. GEMSTONES: Diamonds - approx. 1.70ctw. MARKED: 750. WEIGHT: 8.2 grams.Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancement, unless stated otherwise.