METAL: Platinum. MEASUREMENTS: Brooch is 54mm x 22mm. GEMSTONES: Diamonds approx. 2.40ctw. MARKED: 48644, Plat, side of the pin is marked with dots and lines, iconic pattern to Oscar Heyman. WEIGHT: 9.8 grams.Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancement, unless stated otherwise.