Ludugial gold was a precious metal in the mirror universe, and supposedly impossible to counterfeit. It was the equivalent of latinum.

As such, ludugial gold was used to back the Terran Empire's credit, and the Orion dejebbit. One strip of ludugial gold was worth 1 credit, or 0.1 dejebbits. (Decipher RPG module: Through a Glass, Darkly)