This tool will track GregTech6 ore-bearing rocks so you don't have to super-clutter your waypoint manager in order to find ore veins again.
Additional features are tied in for discovered ore blocks in the vein, and bedrock veins with their indicator flowers. Configurable to also track many of the different stone layer types, and Immersive Engineering's excavator veins - since they didn't add the core sample item for that until modern versions.
This is intended to be used diagetically through the Prospector's Journal item, but defaults to working all the time via keybind much like the seminal TCNodeTracker by Dyonovan.