METAL: 18k Gold. MEASUREMENTS: Necklace is 16.25" long, pendant - 52mm x 30mm. GEMSTONES: Diamonds approx. 0.80ctw, amethyst cabochon - 14.4mm x 11.6mm, pearls - 6.5-8.5mm. MARKED: CY 750. WEIGHT: 63.2 grams.Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancement, unless stated otherwise.