Pure Black Color Crystal

The Pure Black crystal was added to the game's files in Patch 3.2.0, but it seems it never made it into the game itself. We don't have any images, not even an icon for it. It is more than likely the developers were just testing out the concept for a new Cartel Market item. At the time of writing this, there are no pure-black lightsabers in all of Star Wars lore - even the Darksaber has a silver or white edge.