Currency
Different worlds in the Cosmere use different types of currency. The world's of Scadrial, Roshar, Nalthis, and Sel all have their own monies since worldhopping is so rare there is no major trade between worlds.
Scadrial
The Final Empire uses boxing and clips, clips are metal coins useful for allomantic pushes.
Roshar
The primary currency of Roshar is the sphere
Nalthis
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]