Did you see the star-flakes that fell yesterday just as the snow began like the ones below? They closely resemble Christmas cookie sprinkles! But there is a reason for their picturesque, 6-sided figure.
These star-shapes snowflakes are considered dendrites and they are the most common type of snowflake. It was easy to view the individual flakes yesterday because they were not clumped together.
They form when the air is below freezing throughout the entire cloud. This is when ice crystals, supercooled water droplets and water vapor freeze directly onto a larger snowflake. Once the snowflake is large enough it will fall from the cloud and reach the surface. Snow crystals have 6 sides due to the molecular composition of water.
And voila, you have a star-flake!