Delta Gamma House Association stock certificates

[aggieAXO]

I was wondering if anyone could help me find out about some Delta Gamma stock certificates that were in my grandmother's Delta Gamma memorobilia. They were issued in 1936 and she went to the University of California at Berkeley. It says that they are shares of capital stock of Gamma of Delta Gamma House Association. Are they something I should give back to Delta gamma-like a donation in my grandmother's name or are they worthless and I should not even bother?

I would appreciate anyone's info.

Thanks

K