Waystone
A naturally ocurring navigational material.
Waystones (sometimes known as lodestones in other regions of Melior) are naturally magnetic rocks that form from where powerful lightning strikes touch the ground and can be dug up from the surface layers of the world.
Waystones aren’t common and it’s unlikely that you would find one on a beach due to the crashing waves shifting everything around so much that it becomes nearly impossible to spot one. It's good luck to find a small one by chance - the larger ones are usually buried and are only uncovered when land is prepared for construction or when farmers plow their fields.
Wealthy craftsfolk in Jolundria use tiny waystones for magnetic claspings for fine adornments, clothing, and even bespoke hand-carved wooden boxes with magnetic closings for the lid.
I love the concept of the waystones, and I like they are used in compasses. :D