"Anyone can draw a map, boy - there's no more difficulty in that than laying brick. What makes maps useful is when they are so proper, so precise, that they are living images of the places they represent. Encompassing knowledge of the geography, and mastery of the very space itself - that, child, is cartogramancy."
- Sage Pakpao Sasithorn, Chief Lecturer, the Ezagun-Darkbolt College of Cartogramancy
Orcish currency is derived from glass beads. The art of glassworking is well beyond them, but perhaps the orcs have something of value to the civilized races, such as animal pelts, and well made axes, and bows. The humans trade beads for the goods, and the orcs will trade the beads amongst themselves as a form of their own currency. Perhaps they value blood red beads above all others, or animistic orcs favor beads in the colors of their gods.
Inspired by Indian trade beads, some of which could be quite ornate and beautiful. Most North American Indian beads were made in Italy. Surprise!