Element 115

The is one of the four crystal Meteorite Artefacts found in Tomb Raider III. It was fashioned from a meteorite by Polynesians, that impacted upon Antarctica many years ago.

Taken from Antarctica by one of the sailors from the HMS Beagle to North America, it somehow was obtained by the U.S. Government, and it resided in Area 51 before Lara stole it.

Trivia

 * Element 115 has also appeared in the game Call of Duty: World at War's Nazi and black ops Zombies mode, as the power that created the zombies.