METAL: 18k Gold. MEASUREMENTS: Ring size - 7, ring top is 42mm x 40mm. GEMSTONES: Onux - 22mm in diameter, surrounded with approx. 225 black diamonds. MARKED: Pesavento, made in Italy, 750. WEIGHT: 37.2 grams.Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancement, unless stated otherwise.