Idea of Marker Pen Icon
It's a icon of a marker, with the tip pointing to the southwest and the end pointing to the northeast. The marker is shaped like an ice cream cone, thinner as it reaches the end and fatter as it reaches the tip. The tip area is shaped like a sharpened pencil. The tip is shaped like a box cutter blade.
This page shows the different variations of the Marker Pen from an Icons8 icon pack. Feel free to resize and recolor the icon, and then download the icon in PNG format for free.