Just as an added piece of information... Alpha Xi Delta has a special new member pin for colony members. It looks like the regular new member pin ( an elipse with the letters on it) but instead of the black back ground it has gold and is surrounded by by a gold link chain. Colony members usually continue to wear their colony pin as a guard after initiation.
Go here to see:
http://www.alphaxidelta.org/insignia.asp
I've always thought it was a special way to honor sisters who have done something special.