That's a really good question. I don't think there ever has been a paticular symbol...if there was, its not in my Quarterly. As far as I know, the pearl is our jewel and Skiouros is our mascot. Whenever I see anything 'symbol' like--i.e. a keychain, magnet, etc., its always in the shape of a squirrel.
PS: There is NO such thing as a dumb question!