Philosopher's Stone

The Philosopher's Stone, also known by various other names such as the Red Stone, the Fifth Element, and more, is a powerful transmutation amplifier appearing in both the anime and manga. Many of the main events in the series revolve around the Elric brothers' attempts to obtain this stone, in order to gain back their original bodies.

It can greatly boost the effectiveness of an alchemist's transmutation, allowing them to bypass the Law of Equivalent Exchange and perform more powerful transmutations than that which would normally be within their ability. Also, it is rumored that the Philosopher's Stone can allow one to complete a human transmutation. While it is stated that the Philospher's stone allows one to 'break' the Law of Equivalent Exchange, in reality, the price is already paid, as to allow one to do something incredibly difficult (such as bring back the dead), Countless human lives are sacrificed in order to create the stone. Each life or soul is priceless in alchemic terms, so it allows an alchemist to exchange these souls for something else. What they are exchanged for is completely up to the alchemist themself. However, it can range from the completely equal ressurection of another human, to the worthless repairing of an inanimate object.

The Stone can take many forms, ranging from a lumpy, coal-like rock to a viscous liquid, as with the one that Dr. Marcoh owns. Their color is always a dark red.

The raw material of Philosopher's Stone is a very large amount of human lives, ranging from dozens to millions. The first stone in history was transmuted by "Father", using the souls of the people of Xerxes. This event inspired the legend of a country which was destroyed in a single night. The later Philosopher's Stones were transmuted by Doctor Tim Marcoh and his fellow alchemists who were instructed to make the Stones by Lust and the other Homunculus, using the lives of Ishbalan prisoners, and later the makers themselves to cover it up. This series of Philosopher's Stones wasn't complete - they were made from only about 13 prisoners (based on the count shown in chapter 59). The stone that Father Cornello used was also one of this series.