METAL: 18k Gold. MEASUREMENTS: Ring size - 7.5, ring top - 15mm x 24mm. GEMSTONES: Aquamarine (tested RI 1.56) measures 13.9mm x 13.4mm x 9mm, approx. 12.5ct by formula. Diamonds approx. 0.80ctw. MARKED: 750. WEIGHT: 8.5 grams.Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancement, unless stated otherwise.