Float stone is a beautiful, crystal-forming material with magic properties. It varies in color and resembles other more common gems. This substance is extremely rare and so its value is high, its worth being twice that of diamond.
When in close proximity to arcane energies (say from a powerful item, location, individual, etc.), the gems will begin to float.
Such gems have been collected and embedded into enchanted items in an attempt to take advantage of this property. Unfortunately, the energy required is quite high in order for the stones to lift any weight beyond their own.
There are rumors that a pair of boots was once made that used the stones to allow the wearer to levitate. The number of stones and the powerful enchantments made them priceless.
Great potential is seen in float stone and some mages dedicate their lives struggling to successfully apply it.