"Ghostrunning" (a.k.a. "Ghosting", "Ghost Mining") is the practice of deliberately allowing a Ghost to enter a level and convert normal gems into valuable diamonds. This also allows you to grab all other treasure in the level without being constricted by the time limit. Because Ghosts kill the Spelunker in one hit and can freely pass through walls, ghostrunning is an extremely dangerous technique, but it can result in amazingly high scores. The technique is threefold: To ghostrun, you need the following: A video tutorial can be found here: