METAL; 18K gold. GEMSTONES: green tourmaline 12.5mm x 10mm. MEASUREMENTS: pendant is 30mm (including bale) x 16.5mm at widest point. Necklace is 15.5" long, link width - 11mm . MARKED: B. Kieselstein Cord 1978 18K 750. WEIGHT: 143.0 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.