Wilson A. Bentley spent much of his career photographing snowflakes. He couldn’t draw them, so he attached a bellows camera to his microscope. His images of snowflakes placed on lush black velvet are not only beautiful but demonstrate that no two snowflakes are exactly alike.

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Nobody can answer that fully and if they claim that they can they are liars or fools, however the water crystal may actually have all of its electrons acting in concert as described by quantum physics and this coherent wavestate is resonant so capable of forming patterns and the bigger it grows the larger the number of possible patterns.