The term refers to a valuable resource found within a procedurally generated universe, specifically, large, glowing crystal formations that appear only during hazardous weather events on certain planets. These formations can be harvested for materials used in crafting and trading.
Acquiring these crystals offers significant benefits. They serve as a source of income through trading and provide necessary components for advanced technology blueprints, furthering in-game progression. The inherent risk in collecting them, due to the hazardous environments, adds a compelling element of gameplay, balancing reward with danger.