Infinity Gems

In the fictional universe of Marvel Comics, the Infinity Gems, sometimes referred to as the soul gems early on, are six immensely powerful gems. Whoever holds all six gems gains omnipotence, omniscience, omnipresence, and God-like power, and has absolute dominion over the universe.

Each gem is smooth and oblong, and about the length of a man's hand. They can shrink to fit into the groove on the Infinity Gauntlet, where they could formerly act in concert to grant the wearer absolute power over all of reality.

The six gems are:

Time Gem (orange/red*) - Control over the flow of time.
Space Gem (purple) - Control over space, allowing instantaneous travel across vast distances.
Power Gem (red/pink*) - Increases physical strength and endurance.
Soul Gem (green) - Control over the soul.
Mind Gem (blue) - Allows mind control and vastly enhances the holder's intellect.
Reality Gem (yellow) - Control over reality itself, creating and uncreating matter and energy.
Ego Gem (gold) - contains the consciousness of Infiniti, when merged with the other gems reforms the cosmic entity the gems were once part of. Also grants the wielder the ability to manipulate dimensional energies

* Prior to The Infinity Gauntlet the Time Gem was orange and the Power Gem was Red, currently the Time Gem is red and the Power Gem is pink.

The Infinity Gems figured prominently in four major crossovers. In chronological order, they were:

Following the Infinity Gauntlet event, the Living Tribunal declared that the Infinity Gems would no longer function as a whole, although Eternity (the incarnation of that cosmic concept) may be able to reverse the decision should he desire to. When the gems were separated, they were distributed to individual members of the Infinity Watch.

In the recent JLA/Avengers crossover, the DC Comics villain Darkseid obtained the full Gauntlet, but casually discarded it when he discovered it wouldn't work.

The Infinity Gems also figure into the arcade game Marvel Super Heroes.