METAL: 18k White Gold. GEMSTONES: Diamonds approx. 10ctw; Amethyst; Peridot. MEASUREMENTS: Necklace is 18.5"long and 3mm wide. Amethyst/Peridot section is 6 5/8" x 30mm at the widest point. Earrings are 35mm long x 17mm at widest point. MARKED: 750,RCM ,Italian gold mark. WEIGHT: 98.4 grams. Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancement, unless stated otherwise.