Silicax oxalate was a mineral that could be found on the planet of Tatooine. Lorgan Movellan of the Red Key Raiders wished to mine silicax oxalate, along with dilarium oil, from Tatooine, which the local sheriff Cobb Vanth resented. Silicax oxalate was very valuable, so much so that Cobb Vanth used a camtono filled with the crystals that he stole from the Mining Collective to barter for a set of Mandalorian armor from a tribe of Jawas.
- The Odyssey of Star Wars: An Epic Poem (Mentioned only)
- Aftermath: Empire's End (First appearance, simultaneous with Aftermath: Empire's End audiobook)
- Aftermath: Empire's End audiobook
- The Mandalorian – "Chapter 9: The Marshal" (First pictured) (In flashback(s))