Each finite stone which is crystal of energy normally requires at least thousands years of formation. There are mysterious and strong magic powers contained inside stones. Some of them are easy to find but some of them may only be a legend .
It is the most difficult stone to find. Only the special spirit stone which absorbs sky power at the top of the highest mountain in thousands years can transfrom to Sky stone. Air, weather ,cloud and wind can all be controlled by using the stone.
It is the most mystical stone in the world. It consists half light energy and dark energy. No body knows how it was made and where it came from. It perfectly represents the "Ying Yang" theory in China. It is called the mircale of God.
Thunder stone is full of destructive thunder energy. It is strong but instable. It may only appears inside the innermost of thunder clouds. Alhouth the level of its poweful may be higher than that fire stone, it is the most difficult stone that can be use and control.
The space stone is combination of high quanlity space energy. It is as rare as the Bipole stone. it always appears at the depth of aerospace which is hard to reach by normal human. It is easy to do space traveling by using the space stone.
The fire stone with the most aggressive power used to form inside the core of an active volcane. wearing it, the user can make or control the fire at any place. The only disadvantage is it might burn your clothes and hair.
The mysterious treasure that are made by the greatest Master Allen. It combines several finite stones together. With it, Magicians can easily release universal level power but nobody knows the strongest pwoer it can release. Recently, the bracelet is kept by the Master allen's second apprentice in New York.
When all the energy inside the stone has been used, the stone will become almost transparent and jagged. Because it can not be reused, magicians normally discard them as a rubbish. However, some one treats the diused stone as a nice collection.