Currency
Currency varies throughout the Cosmere. The shardworld's of Scadrial, Roshar, Nalthis, and Sel all have their own monies.
Scadrial
The Final Empire uses boxings and clips, clips are metal coins useful for allomantic pushes.
Roshar
The primary currency of Roshar is the sphere
Nalthis
BioChromatic Breath is not the main currency of Nalthis since it is too large a value to be an effective exchange medium. But breaths are bought and sold frequently.
Sel
Wyrnings are a gold currency minted in Fjordell.[1]
The coin has an image of Wyrn Wulfden's head stamped on one side.[2]