With “Avengers: Age of Ultron” now available for the world to see, many Marvel fans are already looking ahead to the super-powered team’s next big conclave. The two-part “Avengers: Infinity War” saga will unite the powerful stones that have been teased since 2011.

[SPOILER ALERT: The rest of this article will discuss all movies in the Marvel Cinematic Universe (MCU)]

As many have already figured out, the core spark for the “Infinity War” will be the six ultra-powerful Infinity Stones (Space, Reality, Power, Mind, Soul and Time). So far, the only explanation for the stone’s existence has come from The Collector (Benicio del Toro) in “Guardians of the Galaxy.” After the ragtag group of heroes brings him the Orb, he reveals that the stones existed before creation itself. The Universe was made of six singularities that were forged into concentrated pieces when the universe exploded. Now, they exist somewhere within the galaxy just waiting to be brought back together again.

In the post-credits sequence to “Avengers: Age of Ultron,” the Mad Titan Thanos revealed the Infinity Gauntlet, which comic book fans will note is the only object in the known universe that can contain all six of the stones at once. The gauntlet, however, was empty when the villain put it on. This begs the question: Where are all the Infinity Stones in the MCU? Never fear: Below is our rundown of each Infinity Stone that’s appeared in the movies, along with everything we know about them so far.

The Tesseract (Space Stone)

Appearances: “Captain America: The First Avenger,” “Thor” and “Avengers”

This item was originally discovered by The Red Skull (Hugo Weaving) during WWII in the first “Captain America” film. The power was too much for the Nazi creator of Hydra to handle, and it teleported him to an unknown location in the galaxy. However, the Tesseract remained on Earth and was dug up by Howard Stark (Dominic Cooper) and given to S.H.I.E.L.D. It stayed with them until Loki returned to Earth in 2012 with his mind-controlling scepter in the first “Avengers” film. Tony Stark (Robert Downey Jr.), who unknowingly replicated an element in the Tesseract for his arc reactor chest piece that made him immune to the scepter’s powers, and the rest of the Avengers stopped Loki in spectacular fashion.

After the infamous Battle of New York, Thor (Chris Hemsworth) returned both the Tesseract and his brother Loki to Asgard where, presumably, it’s still located. However, at the end of “Thor 2: The Dark World” it is revealed that Loki is secretly ruling the kingdom, meaning the first Infinity Stone is far from safe.

Scepter/Vision’s Headpiece (Mind Stone)

Appearances: “Avengers,” “Captain America: The Winter Soldier” and “Avengers: Age of Ultron”

That really powerful scepter that Loki used to almost destroy humanity was obviously something pretty cool. At the end of the first “Avengers” movie, it’s revealed that Thanos loaned the item to Loki on condition that he use it to retrieve the Tesseract for him. As previously mentioned, he failed miserably and both the Tesseract and the scepter were lost.

The mind-controlling stick wasn’t seen again until it was revealed that Hydra had stolen it at the end of “Captain America: The Winter Soldier” during the fall of S.H.I.E.L.D. Ultron (James Spader) eventually uncovered it in the “Avengers” sequel and cracked it open revealing the Mind Stone hidden inside. The insane artificial intelligence that is Ultron hoped to use it to create a better version of himself, but The Avengers managed to upload J.A.R.V.I.S. into the stone-powered body creating The Vision (Paul Bettany). When last we saw the Mind Stone, it was resting comfortably atop Vision’s super-powered head.

Aether (Reality Stone)

Appearances: “Thor: The Dark World” and “Avengers: Age of Ultron”

Thor spent most of his sequel trying to ensure that the mysterious Aether didn’t make it to the hands of Malekith (Christopher Eccleston), the leader of the Dark Elves. Many were surprised to learn that it was one of the Infinity Stones during the post-credits sequence of the film because, frankly, it looked nothing like a stone. The Aether is a liquefied version of the gem that the son of Odin watched transform into a stone in his vision inspired by Scarlet Witch (Elizabeth Olsen) during “Age of Ultron.” The last time we saw the Reality Stone, Lady Sif (Jaime Alexander) and Volstagg (Ray Stevenson) brought it to The Collector for safekeeping. Unfortunately, The Collector’s Collection was destroyed by the Orb in “Guardians of the Galaxy.” So, for all intents and purposes, the Stone’s location is pretty much unknown.

The Orb (Power Stone)

Appearance: “Guardians of the Galaxy”

The 2014 smash hit “Guardians of the Galaxy” opened with Star-Lord (Chris Pratt) entering a temple to retrieve the mystical Orb, which he thought was just a bit of treasure he could turn into money. It’s worth mentioning that the room the Orb was kept in, where the character has his awkward moment with Korath (Djimon Hounsou), has some ancient-looking artwork on the wall that seems to show the creation of the Infinity Stones by celestial beings. It isn’t until Star-Lord and the rest of the Guardians bring it to the Collector that they learn its true power.

The Orb is capable of untold destruction and can even extinguish entire planets with ease. Luckily, the MCU is a place for heroes and the unlikely band of rebels managed to stop Ronan (Lee Pace) from using it to any effect. The Orb was last seen in the pretty secure-looking hands of the Nova Corps. on planet Xandar.

Soul And Time Stones

Appearances: None

So far, these objects have yet to be introduced in the Marvel Cinematic Universe. However, between now and the release of “Avengers: Infinity War” in 2018, where presumably they’ll be discovered by Thanos, there are six films in the MCU. Marvel Studios has “Ant-Man,” “Captain America: Civil War,” “Doctor Strange,” “Guardians of the Galaxy 2,” “Spider-Man,” and “Thor: Ragnarok” to burn through before all of the Stones need to be accounted for