The Crystal Cavern is a place on Triton II unlocked by blowing up the opening with the Explosive. It is a cave tunnel that contains many valuable ores, excluding Platinum Ore and Diamond Ore. The tunnel splits in 2 towards the end, and the end of the right fork contains the Blue Crystal Cave which contains Blue Crystals.
Blue Crystal Cave
The Blue Crystal Cave is located inside the Crystal Cavern and is located at the end of the right fork of the Crystal Cavern. It is blocked by a locked door that can be cut open using Bolt Cutters. The door is too small to fit any Hovercars inside.