This is an authentic Cartier Necklace in silver-tone 18k white gold featuring a stunning line of deep blue sapphires set in a polished design. The necklace showcases precisely graduated round sapphire stones secured in individual settings along the entire length, creating an elegant and timeless Essential Line piece. With a chain length of 40 cm (15.75 in) and a refined 3.0 mm width, this necklace combines classic luxury with sophisticated sapphire brilliance.