There is a handmade craft mercado at the corner of Mariscal Lamar y Benigno Malo, that has various jewelry and one can wonder and view the items for a long time. I happened to go there on Monday night (Labor Day in the US) and looked until it became the same.
It is fascinating to see what they carry, what is popular and how cheap some of the items are. If you are looking for high quality this is not the place. Its more like a flea market in the US. Happy shopping and Saludos!