Board Thread:General Discussion/@comment-238662-20140606160839/@comment-8556753-20140808084319

The Sceptre is not a Stone, because none of the stones are the same colour so then It would be impossible to have two blue ones.

My theory is the stones predate the universe itself seeing as we have some stones that actually are named after key things in the universe (Reality, Time, Space etc) so maybe when the Tesseract was lost Thanos somehow had some left over enough to fill the sceptre which he gave to the Other to give to Loki.