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Sokka and Katara were encased in jennamite until Aang completed King Bumi's challenges.

Jennamite, also known as creeping crystal, is a mineral that grows at remarkably fast speeds. Though it can be dangerous, it also serves as a delectable snack, considering that it is made of rock candy.[1][2]

The crystal can be fashioned into rings to be placed over a person's finger, where it reacts to the body and starts growing, encasing the wearer of the ring. If not removed timely, the wearer could die from suffocation once the crystal has expanded enough to cover the entire body.[2]


Jennamite rings

The jennamite given to Katara and Sokka started out as a small ring.

In order to force Avatar Aang to complete his three challenges, King Bumi slid a jennamite ring on Katara and Sokka's finger, where the crystal immediately started reacting to the body. By the time Aang successfully passed all three challenges, the crystal was already threatening to engulf the siblings completely. However, Bumi shattered it before it could cut off their air supply, and casually started eating one of the pieces.[2]

During the Day of Black Sun, Bumi snacked on a piece of jennamite after liberating Omashu from the Fire Nation occupiers.[3]


  • Jennamite was named after Nickelodeon executive Jenna Luttrell.[4]
  • The only place in which jennamite is known to be available is the city of Omashu.


  1. From older Avatar: The Last Airbender official site, originally on (link). No longer updated.
  2. 2.0 2.1 2.2 O'Bryan, John (writer) & Lioi, Anthony (director). (March 18, 2005). "The King of Omashu". Avatar: The Last Airbender. Season 1. Episode 5. Nickelodeon.
  3. Ehasz, Aaron (writer) & Volpe, Giancarlo (director). (July 19, 2008). "Sozin's Comet, Part 2: The Old Masters". Avatar: The Last Airbender. Season 3. Episode 19. Nickelodeon.
  4. Avatar Extras for "The King of Omashu" on Nicktoons Network.

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