I'm gonna do like some have done and do the groups that were at my school first (but I do plan to do a few of the others, as well).
Alpha Delta Pi—
I screencapped the yellow gold Amethyst badge from the brochure I found while Googling pictures of badges a few nights ago. I'd like to think this badge would appeal to any of the sisters of the Zeta Eta chapter…what with our school colors being Purple and Gold and all—aside from that, I just think the amethysts look especially pretty with the yellow gold. (I'm also jealous of the fact that ADPi's official jewelry includes
stickpin chapter guards. Even the HJ pictures of those are gorgeous.) My second choice would be the 160th anniversary turquoise—either of them.
Alpha Gamma Delta—
Not as many options for AGD badges, but of what there is, I'd have to stick with the crown pearl badge.
Phi Mu—
…only instead of the Garnets that are a part of this badge, I think Amethysts would look amazing. And they
are an option, for any Phi Mu that agrees.
Zeta Tau Alpha—
Pearls with sapphire points wound up being my favorite of the current options. I like the old turquoise and opal (and combinations including one or the other) badges, too.