Sodium was a substance that existed in salt water in many countries. In other places such as the Sahara Desert it was found in the form of sodium sand, mixed with fine mineral particles. comprised certain aircraft fuels during the First NoHead War. Sodium was present in Appalachian Mountains in the Graveyard of Ships as a hazard to scavengers on the surface. It possessed a yellow color in the sand, identifying it and warning those of its presence.
Processed sodium sand was used in several polymers and glues used in industrial construction. Caused by the heavy competition between the sodium sand-rich worlds and the existence of a dozen other substitutes, the market value of sodium sand was in constant flux.
Salt is commonly mistaken for sodium, but it is actually sodium chloride.