When you get serious about your snow science and need to analyze crystal size and type, you're gonna need a magnifier like the Brooks-Range Folding Magnifier X10 to tell what's what. With a 1" glass lens and millimeter scales in two dimensions, this magnifier folds down to a compact 1/2" package for stowing in your pack. Now if you can just find two identical snowflakes, you'll be a winner.