METAL: 18k Gold. MEASUREMENTS: Inner circumference of the necklace is 14" (plus 1.5" opening), necklace is 9mm wide. GEMSTONES: Sapphire, Emerald, Ruby. MARKED: D.Yurman, 18k. WEIGHT: 82 grams.Gemstones have not been graded for color and clarity ,and tested for clarity and color enhancement, unless stated otherwise.