they are stone's the resemble amber. when held in the hand they begin to imprint a strange tattoo onto the persons hand. when it is activated by a key, they tattoo glows and moves to the back of the hand, when this happen's the person is able to use their power. they come in a veriety of shape's and desine's but no two seal crests are the same. the same gose for the power. if you have any more question's post them in the occ.