Chitauri Scepter

Loki's Staff was the staff that was used bye Loki Laufeyson in The Avengers (film).

It had a long Gold/chrome handle, a black peice to hold in the Blue Crystal and Silver Blades around the crystal.

Using it, Loki had the ability to strongly influence minds.

This has been speculated to be because the Blue crystal is the Mind crystal from The Infinity Gauntlet.