METAL: 18k Gold, Silver. MEASUREMENTS: Brooch is 42mm x 36mm. GEMSTONES: Emerald Cabochon - approx. 12.2ct (measuing 15.5mm x 12.7mm x 8.3mm), Rose Cut Diamonds. MARKED: Buccellati, 750. WEIGHT: 17 grams. Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancement, unless stated otherwise.