we're a local too- but our flower is the tempora rose- the pearl is our stone... and a piggie is our mascot... navy blue and white are our colors.... we also have a crest that symbolizes all these different things- honor etc... our alumni site is
www.nusigmachi.com check it out
at our school- i know that alpha phi uses the teddy bear---
phi sigma sigma uses fish as theirs
d phi e is unicorns... and
sigma delta tau i'm not sure about