The Blue Torch is a colored torch crafted with Sapphire that may be used as a light source for an NPC room, or simply as decoration. Like other torches, it can be toggled on and off when connected by Wire to a Switch or similar triggering device. Gems can be found underground similar to ways you would find ore. It is the second dimmest gem-crafted torch (at 30% brightness of a regular torch). File:Terraria - Colored Torches Terraria HERO