Krayt dragon pearls were gastroliths that could be found in the bellies of krayt dragons, a species of large creatures that could be found on the desert world of Tatooine. Those pearls were exceedingly rare and valuable. The former senator Johhar Kessen, a notorious big game hunter, regarded a polished krayt dragon pearl paperweight as the ultimate trophy on Tatooine. In 9 ABY, a group of Tusken Raiders found a pearl in the corpse of a sixteen-limbed specimen.
Krayt dragons had a very long lifespan, and during the course of their life, would ingest stones to assist in digestion. The corrosive digestive fluid would break down and eventually dissolve the rocks. Rarely, a stone would contain a kyber crystal that would remain in a beast's gut being refined over the life of the dragon until it formed a smooth sphere. These pearls could vary in size from palm-sized to larger than a humanoid's head. Because the pearls were formed from kyber, they could be used in lightsabers. A lightsaber equipped with one of these pearls emitted a very powerful and destructive blade that emitted a howling sound when ignited.
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