METAL: sterling silver. MEASUREMENTS: necklace is 16.5" long x 10mm at widest point. Heart tag is 26mm x 21mm. MARKED: Tiffany&Co AG925, Please Return To,New York 925. WEIGHT: 73.8 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.