Levitite

Levitite (レヴィタイト Revitaito), commonly known as Levium Ore (レヴィウム鉱石 Reviumu Kōseki), is a mineral of levium.

Properties
Levitite, like levium, emits levitons, which causes it to float instead of falling. It is commonly found on sky islands, where massive deposits of it keep the islands afloat.

Etymology
"Levitas" means "light" (as in weight) in Latin.