METAL: 18k Gold. MEASUREMENTS: Bracelet is stretchy - will fit approx. up to 7" wrist and is 8mm wide. GEMSTONES: 18 diamonds. MARKED: RC, Signature ruby mark, 1226VI, 18kt, Italy. WEIGHT: 16.3 grams.Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancement, unless stated otherwise.