METAL: 18k Gold. MEASUREMENTS: Necklace is 16 1/4" long, Pendant - 15mm x 7.6mm wide. GEMSTONES: 19 diamonds, sapphires. MARKED: Hamilton, 18k (on pendant) and 18k Italy on necklace. WEIGHT: 3.8 grams.Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancement, unless stated otherwise.