Yes, but grief is much more malleable. The fact that it "penetrated" rather then "shattered" or "splattered" indicates that, at least to a certain extent, that it's capable of retaining it's form. Ditto for the swords and wings. And the Marbles stayed in their shape.
Animated - that is, controlled and moving - is completely independent from retaining it's shape. The marbles didn't just go back into their cloud states, they stayed marbles. That indicates that we can stabilize grief into (at least relatively simple) shapes.