The darsek was a standard monetary unit of exchange within the Klingon Empire. (Decipher RPG module: Through a Glass, Darkly)

It is unclear if the darsek exists only in the mirror universe or in the standard universe as well.

Types of currency
materials	acta crystal • gold • latinum • ludugial gold • silver
units	credit • darsek • dejebbit •dirak • dollar • drokna • ducat • ilec • kern • klon peag • lek • lita • notch-rock • quatloo • sakto • t'chak •tri-esta