I haven't seen any round tables that I can remember with a stone or decorative top that weren't considered outdoor furniture. However, some of the outdoor furniture that I've seen like this could easily work indoors as well, at least as far as the table goes. Most of the chairs tend to be somewhat oversized and may be too big for what you're saying is a small nook. You can also consider having an Oak base made in a pedestal shape and having a piece of either granite, marble, or even corian top made. There are many small scrap pieces available at stone yards that can be cut to size for a minimal fee. I think for what you're looking for, you may be to think outside the box.

As far as chairs goes, the only concern I've had with iron and this is from personal experience, is that they tend to be heavy. They can also scratch the travertine floors. I think it's nice to use Parsons chairs to bring in more color to the kitchen. I've bought them twice from Carrington Court at very reasonable prices and the quality was exceptional. They are available with casters which will roll easily on the tile floor.

I'm always on the lookout for furniture so if I see anything online, I'll check back to see if you've found something or let you know. Hope these ideas help!