Quote of the day: "The foglets' bodies would be made of aluminum oxide rather than combustible diamond to avoid creating a fuel air explosive."
This is cool! It reminds me of that material the protagonist creates in Big Hero 6.
At such a small size though, would it be possible to breathe it in?
You could breathe one, but I imagine you would not usually encounter a single one by itself.
They would always be in the form of a connected cloud with arms stretched out attached to another. If you walk through the cloud, they'd detach making a hole and pull back away from you.