Adamantine

Category:Resources
Nigh-indestructible metal.
Used in: Dreadnought-class starship bridge module.
(spoilers!)
 
Common sources: None. There are likely less than five units of Adamantine to be collected from Anomalies of all types. Trade will be necessary, and it's suggested that Adamantine only be purchased from the Ermyr Defenders or the Goryr.
Remarks: Highest value-density of any resource (except perhaps research points or skill points, both of which are quasi-finite). Fortunately, as the player ship can only have the one bridge, and there are no other instances where the metal can be spent, the maximum Adamantine count needed in the entire game is 6 units.