Taydenite

Taedenite is the rarest living gem in the galaxy. The villain, Vulkanus is known to deal in this rare gem which can be used to power star ships. It first appeared in the episode Kevin's Big Score. When Kevin arrives looking to obtain an important item (a holo-viewer from Grandpa Max), Vulkanus decides to get back at him for a previous betrayal by forcing Kevin to absorb a small piece of Taedenite, thus causing Kevin's body to mass-produce the gem, thus giving Vulkanus an endless supply. However, he is foiled by Ben and Gwen who arrive to save Kevin. Rather than attempt to arrest him, however, Kevin leaves Vulkanus with the small fortune in crystals he had managed to chip off beforehand, considering it as payment for his past actions.

Taedenite is revealed to be to power source for a Takion 930 starship in the episode The Con of Rath. According to Gwen, every time she, Kevin, and/or Ben come across/mention it, they run into Vulkanus, which is proven true when Vulkanus appears shortly afterwards (This maybe due to the gem rarity and value). During the episode, Vulkanus and his henchmen are shown have a small Taedenite mining operation, which is destroyed by Ben (as Rath).

It is said in the video game, Vilgax Attacks that Taedenite can be used to make an energy core but required a large supply, the second largest in the galaxy according to Paradox.

Kevin claims that "nothing is harder than taedenite" (not even diamonds) said by Kevin in the Ultimate Alien episode, Too Hot To Handle and by the time of the same episode had mastered control over absorbing it as if it were any other material he was absorbing and like most items he absorbs was able to transform it into weapons. He was also able to open P'andor's suit using a fragment of Taedenite something that no earth bound material was able to accomplish.

Taedenite grows on the planet MorOtesi (Chromastone's home planet) as seen in the video game Vilgax Attacks, where it can be shattered by Echo Echo's screams. According to Professor Paradox, MorOtesi is the largest source of Taedenite in the galaxy outside of Vulkanus's stores/cashes of the gem. Cooper Daniels has also developed a way to convert energy from taedenite into a power source (also from Vilgax Attacks). Dwayne McDuffie has confirmed that Vilgax attacks is non-canon and it was Proven MorOtesi is also non-cannon as Sluglite, Chromastone's DNA Donor, homeworld is Petropia.

Trivia

 * Taedenite appears to be the interstellar equivalent of earth diamonds (as both are rare gems and known from their exceptional hardness).
 * It appears energy from tadenite can be converted into Sub Energy, through a process developed by Cooper Daniels.
 * Gwen's statement about Vulkanus appearing shortly after they either encounter/mention Taedenite has been proven false twice in "Vilgax Attacks" & in the episode Too Hot To Handle, where Vulkanus had no appearance.
 * Taedenite is the only material known to be capable of penetrating the metal of P'andor's and/or NRG's containment suit.
 * Taedenite is the most precious material in the Milky Way Galaxy.