Board Thread:Questions and Answers/@comment-7657843-20161026140751/@comment-1031724-20161027215849

Let's see...

The tesseract was hidden on Earth before Red Skull found it. After it killed Red Skull it fell into the ocean, was fished out by Howard Stark, and studied/used to create weapons by SHIELD, drawing Loki and Thanos. It is currently in the vault at Asgard.

The Aether was sealed in a dark dimension, ant at Convergence, Jane was sucked into that world where the Aether entered her. It is currently with what remains of the Collector's collection.

The Orb was on Morag, is currently on Xandar, and has never been to Earth.

The Mind Stone was already in Thanos's possession and given to Loki, later taken by Strucker, and is now in Vision's forehead.

The Eye of Agamotto, which I think was confirmed as an Infinity Stone (as I suspected the minute I saw a picture of it with the green light and mentioned it has time powers), well, I didn't read too much into it. I'll be able to say more once I've seen Doctor Strange on November 4th.

That just leaves the orange Soul Stone, which will probably be revealed in Guardians of the Galaxy 2 or Thor Ragnarok.