Infinity Stones

Infinity Stones are six immensely powerful objects that hold predominance over the universe. Each of the stones possess unique capabilities that have been enhanced and altered by various alien civilizations through the millennia, making the exact age and origins of the stones unclear. Despite being refereed to as "stones," the Infinity Stones appear in different shapes and states. Combined with the Infinity Gauntlet, the stones can become the strongest weapon in the universe.

Powers and Abilities
Each of the Infinity Stones can be used individually or together when using the Infinity Gauntlet, making it the strongest weapon in the universe.

Trivia

 * The Infinity Stones are known as Infinity Gems in the comics.
 * In the comics, the six Infinity Gems consist of Mind, Soul, Power, Space, Time and Reality. Kevin Feige confirmed the Tesseract represents the Space Stone, and the Orb has been revealed to be the Power Stone, but it has not been revealed what the other Stones represent.
 * Due to the appearence of Thanos, fans have speculated that the blue crystal on the Chitauri Scepter is the Mind crystal from the Infinity Gauntlet.