REGARDING THE FALLING SNOW

I'm still wondering about the chemistry of falling snow.  So if every single snow flake is different, then does that mean that every single ice crystal is different from each other?  To be more exact, if snow, water and ice is the same substance.  However, while microscopic water and ice is the same, microscopic snow is different from each other.  What is the chemistry properties that much such a thing possible?  I wish I knew more about chemistry so that I could know for certain.

While I'm lost in thought about the falling snow, here is some photos of film and television actress Emily VanCamp.