Hope I remember this right!

Alpha Gamma Delta alumnae can wear the Badge over their heart, on a pendant (thank goodness...I misplace it less), as a lapel pin and a ring. I had the ring holder but I gave it up because I was afraid that I would lose the top pearl, plus the sharp edges made it more likely to get bumped..

Collegians are to wear it over their heart.

SAI members can only wear our badge as a pin, over our hearts; they specifically state that you cannot turn it into a charm. I assume that is the case for alumnae also. I wish I could wear it all the time though!