The Kaweco Iridescent Pearl – a fountain pen in an unimagined variety of colours: Depending on the viewer's angle of vision and the incident light, the writing instrument shines in an uniquely shimmering colour scheme. Imitating the optical effect of a pearl, the translucent material of the fountain pen shines in colours ranging from green-bluish to pink. The packaging of the fountain pen is suitably designed with iridescent foil. Its optic mimics the streaks occurring through the pigments in the pen's plastic, contributing to the unique look.