METAL: 18k Gold. MEASUREMENTS: Necklace is 16" long, pendant - 20mm x 20mm x 18mm. GEMSTONES: Ball shaped gemstones - peridot, aquamarine, amethyst, citrine, tourmaline. Diamonds. MARKED: Bibigi 750. WEIGHT: 12.1 grams.Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancement, unless stated otherwise.