Obsidian asteroids at the Spine of Lok. Positioned in orbit encircling the planet Lok within the Karthakk system, the Spine of Lok comprised a massive asteroid belt. Its composition was almost exclusively obsidian rock, causing it to be almost undetectable against the black void of space. Throughout the time of the Galactic Civil War, this region was an unused source of raw materials, and the full extent of its mineral wealth was still a mystery.