What does the crystal represent in the new Naruto Op (ep 432) I can think of a few meanings for the crystal, but I was wondering if there is anything "official" stated or if it was related to an actual crystal in the series? 

Or maybe its just that someone on the Naruto production team likes Final Fantasy.
After watching the opening, here's my version :


  It's all about the collective hopes and dreams people have for one
  another and themselves. All of the dead characters passed down the
  circular stone that represented the hopes they had for Naruto, who
  embodied the future. Naruto struggled to achieve the goal by
  struggling no matter how tired he was. Or this crystal can also be the past, that's why Sasuke would want to destroy it (but later, he accepts it).