Before ya start crushing them all up I'd get them all cleaned up and then only crush up the smallest of the pieces at first. I'm seeing a lot of rust staining in the matrix which tells me it's got a high iron content. Soak the pieces in Super Iron Out which you can pick up at Wally-World or Ace hardware to remove as much of the staining as you can. SIO won't hurt gold at all so don't worry about that. Pieces that size can get you more money than plain old gold will because it's still in matrix and will make for some nice specimens.