The Obsidian Sword was a weapon crafted by the Mustafarians from Mustafar's sharpest obsidian, and were similar to the Obsidian Lance. These swords were the favored weapons of their creators, who would specially carve the hilt of the blades. This meant that no blade was similar and made each sword unique.
Behind the scenes
The Obsidian Sword appeared in the video game Star Wars Galaxies, a massively multiplayer online roleplaying game developed by Sony and published by LucasArts, prior to its closure on December 15, 2011.
Appearances
Sources
Chu-Gon Dar Cube Items on the official Star Wars Galaxies website (original site is defunct)