Leestone

Leestone is a white hard mineral like marble, that is found in northern mountains of terragard, and the northwest Skylands.

Formation
Leestone was first formed in the primordial beginnings of the planet, when a metero crashed into the oceans, superheating the floor of the ocean, which was made up of primarily a massive mineral deposit. When superheated, the stone melted into a marble-like white stone substance.

Since the primordial era of the planet was a turbulent time and the form and shape changed drastically over millennia, this leestone formation was broken up due to earthquakes and tectonic shifts. An ice age also contributed to the movement of the leestone, where glaciers carried deposits across the planet.

Primarily leestone is found only in terragard above the surface of the oceans, where two tectonic plates collided and formed a landmass. Part of that landmass is what makes up Terragard today, and leestone can only be found in the northern Winterspine Mountains and in the Skylands to the northwest.

History
During the sundering, the leestone deposits in the skylands were ejected from the earth in a cataclysmic event, and the leestone now hovers in the skies above the skylands, carrying with it massive motes of earth, some the size of large islands, with their own ecosystems and even some civilizations have built there.

Use
Leestone is notoriously difficult to work with, but is susceptible to radiant damage, and if a way can be found to work the stone, its would make for a suitable structural stone. It looks similar to marble, but has interesting magical qualities.