The Trinity Stones consisted of mighty, ancient megaliths that were located on the jungle-moon of Nallastia, which orbits Fondor. These artifacts were arranged in a vast field millennia ago, preceding the construction of the Skull Queen's fortress on Mount Octan. Nallastia Octan, the wife of the Margrave Octan and original colonist of the moon, was responsible for their placement. Each megalith was eight meters in height, and each one stood three meters apart from the others.
These stones were arranged in a triangle, and this arrangement generated a strong magnetic field, essentially a lunar gravity vortex. This vortex could only be disrupted by the balancing influence of the Margrave's old power gems. These gems eventually became known as the Lost Stars of Nallastia, and Nallastia concealed them within the Cavern of Screaming Skulls.
A group of fifty Nallastian warriors were assigned to protect the Trinity Stones. If even a single stone was knocked over or harmed, the resulting energy release would have devastating consequences for the jungle-moon. However, after the Jedi had liberated Fondor from the destructive plans of Groodo the Hutt, the Skull Queen deactivated the force field that was between the Trinity Stones, doing so for the overall benefit of both Nallastians and those considered "outlanders".