Latinum

Latinum is a valuable material in the Star Trek universe, and has evolved into a common currency among various alien races.

In its natural state, latinum is a silver liquid. It has no known industrial uses, but its rarity and the fact it cannot be replicated has made it a valuable substance. For ease of handling, it is often placed within strips, bars, or bricks of gold - hence its informal name of gold-pressed latinum.

Latinum is the standard currency of the Ferenginar, Bolian and Lissepian central banks, and the de facto currency for interstellar trade by independent systems