Fishing Puerto Vallarta

What are the best beaches of Puerto Vallarta to collect sea shells?
I prefer a variety of colored shells. I also like collecting nice pebbles, sea glass, shells or starfish, etc.
What I did last year when I was there as there were no shells on the beach I went to the market, bought a huge assortment of downtown and five dollars. I brought with me ziplock bags and collected the sand while I was there too. When I got home I bought conatiners very nice glass and makes a deal of sand and shells for my boyfriend, me and my mother. Do not think you will find shells on the beach there. We stayed at the Golden Crown and perhaps other areas in that city have shells on the beach, but I doubt it.,
Balloon Fishing Puerto Vallarta