<p>The most convincing argument that it's another Infinity Stone is that it couldn't be powered by the Tesseract since Loki had it before coming through the portal. Thanos didn't have the Tesseract, so he couldn't use the Tesseract to power it before giving it to Loki. However, it's also possible that it's not another Infinity Stone but merely a gem that has been POWERED by an Infinity Stone. Meaning that Thanos might have the real Mind Stone in his possession, and merely charged up the scepter with a small portion of its energy (the way the Tesseract can charge weapons). </p><p>The most convincing argument that it's NOT another Infinity Stone or even related to any Infinity Stone other than the Tesseract is that it glows blue, like the Tesseract. In the comics, each Infinity Gem is a different color and they appear to be following that pattern in the MCU. </p><p>So there IS the possibility that the scepter was created a long time ago by someone who DID have the Tesseract at the time. And its relation to the Tesseract allowed Loki to open the portal from the other side, briefly. In fact, if Thanos had recently come into possession of the scepter it would explain why he targeted the Tesseract first. </p>

<p>Indeed... There are lots of possibilities, I hope Marvel solve this in Age of Ultron </p>

<p>My only complaint is WHEN the "real" mind gem shows up, what is that going to do that the Chitauri Sceptor doesn't already do? I would imagine that the mind gem/stone would control minds as well... </p>

Didnt Ronan take the power gem from Thanos? The Mad Titan only asked ronan to acquire it.

<p>Fact is why trust anyone with an infinity stones if you can't afford to take the chance.  Something like an infinity stone would be a mission you would do alone. </p>

Another question without an awnser: How did Loki activated the Tesseract to open a portal from the Chitauri Space?

<p>Well it's said that Thanos will be able to comunicate to earthlings who have the scepter in AoU, so does he have another mind gem?  Thanos has something in his posession that somehow activates the stones. </p>

<div class="quote"><i> <p>Blaublau94 wrote: </p> I think that because all of the infinity stones in the comics were part of an all power full being it is possible that the Chitauri sceptre is an infinity stone because they where all together once</i></div>

<p>It is not a stretch of the imagination to see it either way. I think it is the mind gem and just wanted to be reconnected to the cube. Their power is not the same, but very similar. </p><p>I find it funny that the stones/gems give off gamma readings because the Hulk is already powered by gamma radiation. If Loki's goal while in SHIELD captivity was to unleash the Hulk, the scepter could have brought about a transformation without getting him angry, or maybe if it was the mind gem triggering the Hulk-portion of Banner's brain thereby triggering a transformation anyway. </p><p>In any case, the scepter and cube are linked in power readings, each a singularity from the beginning of the universe wanting to rejoin with the rest of the 5 stones, like the One Ring in Tolkien mythology. The only reason they are not drawn together is because they are contained in some sort of cosmic containment unit (a la Infinity War storyline). The scepter holds the mind gem's power in check the same way the tesseract holds the reality gem's power back. The granite block for the aether and the orb worked the same way. </p>

<p>I think it's simpler than that. The Scepter can't be the Mind Gem because it's blue. The Tesseract is also blue. Both the Mind Gem and the Space Gem can't be blue, in movies about magic stones granting flying men godlike powers, that would just be nonsense. </p>