Zersium was an ore found on the moon of Dathomir, Koratas, and Dor. It was used in the construction of durasteel and dura-armor, specifically blaster rifles during the Great Sith War, and as zersium flecks in the black body glove worn by Imperial stormtroopers, providing additional insulation and reducing thermal discomfort from impact with a blaster bolt.
- Star Wars: Knights of the Old Republic II: The Sith Lords
- Star Wars: Clone Wars Adventures video game
- "Tinian on Trial"—Star Wars Adventure Journal 4 (First appearance)