Lodestone is a useful material for upping your Stonecutting and is useful for a variety of higher-tier crafted items in the game.
Lodestone is a tier four resource and requires a level of 105 in Mining before you can collect it. It's also arguably one of the more important resources in New World, as its refined form, Lodestone Bricks, are used to craft various Tuning Orbs to access late-game Expeditions.
Lodestone is mostly found in the Northern areas of the map, around Great Cleave and Mourningdale. This short guide picks out some of the best spots to mine for the stone, as well as what you can do with it once you've gathered it all up.