METAL: 18k Gold. MEASUREMENTS: Ring size - 7 1/4, ring top - 10mm x 16mm. GEMSTONES: Side diamonds, Center clear stone - 8.1mm x 8.1mm. MARKED: JHK, 18k. WEIGHT: 3.2 grams.Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancement, unless stated otherwise.