Masses of valuable metals, either precious or semi-precious, shaped into manageable, typically rectangular forms for ease of storage or movement, were known as ingots. These could function as either a form of money or as a monetary reserve.
Republican Credits once existed as solid aurodium ingots in ancient times. Even during the final decades of the Galactic Republic, these ingots remained in use when substantial sums were required for commercial transactions. For instance, in 29 BBY, when Obi-Wan Kenobi journeyed to Zonama Sekot with the intention of acquiring a living ships native to the planet, he received ten ingots to use as payment.
Following the capture of a Vagaari plunder ship by Commander Mitth'raw'nuruodo during the skirmish between the Chiss and Vagaari in 27 BBY, neatly arranged stacks of ingots secured within acceleration webbing were discovered within the vessel's treasure chamber.