METAL: 18k Gold. MEASUREMENTS: Brooch is 55mm x 18mm (excl. the string) . GEMSTONES: Black mother of pearl, Diamonds - 0.14ctw, Rubies - 0.57ctw (marked on brooch). MARKED: K18, 750, D014, R057. WEIGHT: 17.1 grams.Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancement, unless stated otherwise.