Casandrium is a material that is obtained by refining apolonite in the Ore Refining System. Specifically, apolonite ore can be mined using the Mine Extractor in 16-17 minutes with level 4 mine software and then refined in 8-9 minutes. Alternatively, an apolonite ring can be recycled; this will yield an apolonite gem, which can then be refined to gain casandrium in 1-2 minutes. Apolonite ore, gems, and rings have a stack limit of 50; casandrium has a limit of 300.
Casandrium is used to produce the following items: