METAL: 18K gold. MEASUREMENTS: bracelets will fit up to 7" wrist, Bracelet width is 2mm. MARKED: TIFFANY & CO, Gehry 750. WEIGHT: 31.4 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.