Quote Originally Posted by Fantasia View Post
If anyone can help clarify the meaning then it'd be wonderful
You've got it pretty much figured out. Suspending magnetite in a liquid was one of the earliest forms of navigation tools, right up there with just following the stars; call it what you will - guide stone, leading stone, way stone.

In Final Fantasy, you play an adventurer - a trailblazer out on the frontier.
Your Lodestone is how you find your way.