I was just now reading aephialum's badge thread and this hit me. Do many GLOs allow members to choose the jewels in their pins?
I got opals in mine--I don't think that Pi Phi has set requirements, although pearls are the classic choice. The neat thing is that instead of being bluish-white like those of my big and others, my opals are actually wine and blue, the sorority colors!
I bought another pin to pin my daughters with, should any of them pledge Pi Phi. I wear it some so that they'll think of it as mine too but...ain't no way I'm gonna let those kids wear my special opals around campus!