Unstealable Jewel

Unstealable Jewel (called Intangible Treasure on the Revival disc, sometimes unofficially referred to as The Treasure Which Cannot Be Stolen) is Disc 1, Track 16 on the Xenogears Original Soundtrack and track 17 on the Xenogears Original Soundtrack Revival Disc -the first and the last-. A vocal remix of the track, Memories Left Behind (Revival Version), was made for the Revival disc, and was also performed at the Xenogears 20th Anniversary Concert -The Beginning and the End-. The track is one of the tracks playable in the Nortune jukebox, under the option 'Requiem'.

The track plays as the music in the following cutscenes:
 * The lights come on in the Nisan Mausoleum, revealing Andvari.
 * Citan talks with Yui before leaving for Solaris.
 * Lacan speaks with Krelian about getting more paint and Krelian's newfound interest in nanomachines (flashback).
 * Elly brings Fei into her home in Solaris. (The music continues as the area theme until Elly's father returns, except for when Elly tells Fei about her biological mother.)
 * Elly's mother tells Elly that she should live her life as she chooses (flashback).
 * Elly successfully attempts to reawaken Fei (who was at the time controlled by Id) on the deck of the Yggdrasil III.
 * Fei and Elly both independently narrate how they had dreams of past lives, especially of Lacan painting Sophia's portrait.
 * Fei and Elly reunite on top of Taura's house.
 * Emeralda says that she wants to go with Elly to the Mass Driver Facility.
 * Krelian tells Lacan that he's studying from Kim's research journal (flashback).
 * Ramsus overcomes his feelings of low-self-esteem, and Fei states that he wishes to have a friendly fight with him after the end.
 * Emeralda turns into her older form in the ruins of Zeboim.
 * Fei and Elly reunite after Urobolos is defeated.

Intangible Treasure - Orchestral Version -
Intangible Treasure - Orchestral Version - is a remix of Unstealable Jewel. It is Track 4 on the -MYTH- The Xenogears Orchestral Album CD and track 3 on the A-side of the vinyl release.