Orbs of Power

From Wikipedia of the Dark Brotherhood, an online Star Wars Club

The Orbs of Power were three large crystal spheres obtained by Clan Naga Sadow under the reign of Consul Kale Lobacz. There was one for each Order, a ruby orb for the Sith, a sapphire orb for the Obelisk and an amethyst orb for the Krath. They were unearthed during excavations to various planets throughout the galaxy.