Maybe . . . and I'm just saying maybe . . . it's the pledge pin of the co-ed professional chemistry fraternity Alpha Chi Sigma. The symbol on the pin that you described as a fancy lower-case "h" with a slash through the top is indeed on the Alpha Chi Sigma pledge pin. The shape is what throws me a little. Yes, the Alpha Chi Sigma pledge pin has curved "indented" sides ) ( but the top and bottom are a little different from the Beta pledge pin. The top has just two slanted sides that come to a point and the bottom is the same thing, only reversed, of course:
top /\ and bottom \/.
I searched a few of their chapter web sites in hopes of seeing a pic of their pledge pin, but no luck. Probably a pic is out there but it may take actual ability to find it
.
Good luck in making a 100% accurate ID !