Taydenite is the rarest form of diamond in the Milky Way Galaxy. 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.
- Kevin claims (and Dwayne confirmed) that "nothing is harder than taydenite".
- Taydenite is the most precious material in the Milky Way Galaxy.
- Taydenite is the only material known to be capable of penetrating the metal of P'andor and NRG's containment suits.