Just had to comment - I don't think this is a Blue Charm.
If I had to guess (without being able to see much of the body), I'd say that this is a reduced hairwing version of a Jock Scott on a small double hook. (It's not uncommon for patterns to be reduced for use on small hook used for actual fishing as opposed to display.)
A Blue Charm would have a black body with silver rib and a gray squirrel wing.