My favorite thing when I was a collegian was a wide band ring with the crest on it.  It came in all gold or all silver.  I wore it on my pointer finger.  I gave it to my little sis (wish I had kept it!).  They still sell them- go to 
www.deltagamma.org   then go to Anchor Trader there is a link to their jeweler.  They have become much more expensive than in the late 80's.  
   My favorite thing as an alumnae is:  My circle pendent pin-holder!   It allows you to wear your pin in it or take your pin out and wear the pin separately.  They didn't have them when I was in school.  They are pretty pricey but I get sooooo many compliments on it because it allows me to wear my pin all the time.  I wear it on a long chain & sometimes on a choker-type of necklace.  I have the silver one because my pin is white gold.  You can also find the pendant on DG website's jewelry section.