Shopping in Mazatlan can be very predictable, with the usual trinkets and trash sold in store after store in the Golden Zone.  Not that there is anything wrong with that, of course!  But if you're looking for something a little different to take home as a momento of your trip, there are some better options:

The Copper Gallery-- located in the Golden Zone amongst all the other tourist shops, but offering beautifully crafted, handmade copper art.  From bowls to vases to sinks, all of these goods are made by artisans from Santa Clara del Cobre -- a colonial town in the mountains.  

There is a store selling natural cotton clothing nearby on the same side of the street, really gorgeous dresses for women and dress shirts for men!