- Star Trek: The Motion Picture
- Star Trek II: The Wrath of Khan
- Star Trek III: The Search for Spock
- Star Trek IV: The Voyage Home
- Star Trek V: The Final Frontier
- Star Trek VI: The Undiscovered Country
- Star Trek Generations
A translucent, egg-shaped object used by Tarquin, the Delphic Expanse exile who pursues Hoshi Sato, to extend the range and power of his own telepathic ability. It glows internally when in use, upon his touch, although other species may be able to use it as well. His family gave it to him when he went into exile.