Quadrillium was a mineral found in abundance in asteroids, particularly within the Tava Yagen asteroid field. During the Galactic Civil War, it was valued at approximately 50-75 Credits per kilogram.
Quadrillium is misspelled as "quadrillum" in a table of metals and minerals appearing on page 37 of Pirates & Privateers. It is spelled correctly in other instances throughout.
- Planets of the Galaxy, Volume One
- The Star Wars Planets Collection
- Pirates & Privateers
- Lords of the Expanse
- Cracken's Threat Dossier
- The Complete Star Wars Encyclopedia
- The Essential Atlas