LorrdianLorrdian gemstones are crystals used to upgrade lightsabers. They originated during the Kanz Disorders, when the enslaved Lorrdians were forced to develop kinetic communication to communicate with one another. This gave the Lorrdians the ability to better predict the actions of others, including their Argazdan overlords, by careful observation of subtle changes in body language.
A few Force-sensitive Lorrdians imbued certain gemstones with similar abilities. When these gems are installed in a lightsaber, the user is better able to read the actions of their opponents. This enhance the wielder's overall defenses and ability to deflect blaster bolts.