Symesium was an uncommon material found on Relic planets, like Gardor. Symesium was a hard, blue rock that was often found loose in dirt or large stones underground. The material was also found in the beaks of Yarmon, a large bird that was common on Gardor. Scientists studied the causes of the Yarmon's beaks, but were never able to determine a proper conclusion. Symesium was often sold for high prices due to its rarity and beauty.