Surprisingly luxury. Feel the luxury of the Cartier Diabolo every time you write with the exquisite texturing of décor grain d’orge in bright, polished platinum over steel. The solid heft provides sure comfort while the noble platinum precious metal assures that the brilliance of your Diabolo never tarnishes. Your fountain pen is graced with an iridium-tipped 18k nib, and each Diabolo is crowned with the sapphire translucence of a blue cabochon.