The Fellowship of the Crystal
After the defeat of Darth Sauron, Isildur-Adi-Mundi stole the crystal and was corrupted by its power so he wore it around his neck. After he refused to listen to Delrond (a mix of Elrond and Dex from the 2nd star wars) and give it to the most powerful minds on the planet Mordor, who were the only ones who could deactivate the crystal he thought himself invincible.
A year or 2 after the battle as Isildur-Adi-Mundi was patrolling the moons around Gondor he and his fleet were ambushed and destroyed by a huge battalion of Orcish ships that took advantage of his cockiness that emerged from hyperspace. Since Kai-Adi-Isildur's body was destroyed, the crystal was lost.
After 100 years had passed, the crystal found itself in the hands of a young man named Astdo (Frodo and Astri from Star Wars Books) who lived among small people on the Planet Shire in the Hobbiton temple and was friends with Cholly (Sam), Wheez (Merry) and Tup (Pippin). Although Cholly, Wheez and Tup provided all the excitement that anyone could ever want Astdo also knew a Jedi with an extreme connection to the force named Yodaulf who hade made a study of the crystal and traveled throughout the universe.