Most interesting detail in these snowflakes is hourglass-like air cavities inside of crystal. As you can see, these hollow regions variable in shape, but perfectly symmetrical on both sides of column, like one half is the mirrored copy of another.
Similar to hollow column snowflake type is capped columns...
...and icy needles:
Needle snowflakes are much longer than hollow columns, and also contains air cavities in form of hourglass. Sometimes these needles grows very long, so they become easily recognizable with naked eye, without any magnification tools. On this photo, you see "chaotic" variation, but sometimes can be found perfectly symmetrical and very clean needles. I'll try to find some better needles in my snowflake archive and process them soon.
If you want to see more snowflakes, you can browse through all snowflake pictures.
Here you'll find snowflake photo wallpapers in numerous resolutions and screen proportions, up to Ultra HD 4K.