Meditation crystals were naturally-occurring rocks that assisted in inducing meditation. Growing naturally on the Deep Core world, Tython, slivers of a meditation crystal could be placed inside the hilt of a lightsaber to produce a coherent beam of energy, as well as assist the wielder to stay in closer connection to the Force during combat. This enhanced connection allowed the user to retain energy while fighting rather than losing it. Jedi Master Rahm Kota gave two of these crystals to a clone of former Sith apprentice Galen Marek on the way to the Salvation.