METAL: 18K gold. GEMSTONES: fancy color diamonds, green stones, carved crystal. MEASUREMENTS: necklace is 16 3/4" long (including clasp/pendant) x 30mm wide. Clasp/pendant can be worn as a brooch. Pendant/brooch measures 51mm x 44mm at widest point. MARKED: 750 18K. WEIGHT: 163.8 grams. Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancement, unless stated otherwise. Watches are guaranteed to be in running order, if described as such, at the time of listing only. Watches have not been tested for features functionality, unless otherwise stated in description.