METAL: 18k Gold. MEASUREMENTS: Necklace is 15.25" long and 9mm wide. GEMSTONES: Ruby, Sapphire, Emerald cabochons. Diamonds approx. 1.00ctw. MARKED: or750, French marks, Van Cleef & Arpels, made in France, 4K 623, 750. WEIGHT: 47.2 grams.Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancement, unless stated otherwise.