I agree with the others, you do need to have very good pictures to the point that one can see the item as if they were holding it in their hands. That can be a pretty good challenge.
That said, though, I've found in cleaning out my jewelry stock that most items outside of anything made of precious metals and real gemstones isn't going to bring all that much per piece. Most people that run garage sales around my are will toss costume/paste jewelry out for 25c a piece, if that. Consider that you're shipping the item too, so you won't get any bites for anything that fits that category.
However, lots of such items are pretty popular on here. I had a few more unique paste items go for a fair amount pretty quickly in a listing (search my forum posts, you'll see me asking about them). Also noted in that thread by responders was that I probably could have moved stuff here as a lot that I ended up donating thinking it would be prohibitive for the shipping.
But overall, toss a bunch of similar stuff into a lot and make it so each item is about that quarter total, and it should move and give you a fair return. Luckily you can ship a ton of jewelry cheap so you'll hit profit level pretty quickly. Check everything though as you can pretty legitimately separate out jewelry with the precious metals (get solid pictures of the notation marks noting this!) and real gemstones and get some real bucks out of each one.
Hope that helps.
