The top pic is a small 2x3" chunk that has the black inclusion tells, and the bottom pic I am less convinced of, but it does have some of the metallic character of the other two steely-blue stones in the group photo. You can see the end saw marks in the lower pic which are on the 2.5x5" stone that is obviously a special stone. It has all of the idiosyncratic tells.
Could you add some detail shots of the other ones you posted ?