Laban MOP RollerballNatural, pure, nacreous mother of pearl, an iridescent gift from the ocean. The Laban Mother of Pearl, which is known as a protection stone and a stress relieving stone, brings you the power of the sea. ABOUT PEN BARREL The materials of a MOP rollerball are the true natural mother of pearl and resin lacquer. It is a harmonious and balanced pen as if there is a tiny universe in hand. The MOP pens are slightly heavier than other pens, which set off the