The Long Life Stone is an object that appeared in "Smurfquest". It is a crystal, contained in a magic box that can be opened by a special key, which controls the aging process of a Smurf, allowing them to live long lives. However, the crystal's power only lasts for about 1000 years, after which it must be replenished with pure sources of the four primal elements to restore its power. One sign of its weakening power is that the Smurfs start to rapidly age (though with the Smurflings and Baby Smurf it doesn't cause them to grow taller as they age) and the Smurf Village around them starts to deteriorate.