Are they banks? or Gold shops?

Recently I happened to be in HDFC bank for some unfortunate reasons. I have seen that HDFC bank is selling Gold. I used to think that banks are for lending money and other financial related tasks. Due to this new Gold selling function of that bank I did suffer. I dont know what the management of the Bank wants from selling gold. Why wont they start new subsidry of HDFC bank and use do such tasks? Are the bank employes having less work?

Any one from HDFC bank?