This is the kind of shop that might be called (fondly, we promise) a hole in the wall, but while Nature's Gallery is short on square footage, it's got glitz aplenty in the form of rocks and minerals from around the world: polished and rough-cut stones, crystals, geodes and fossils fit for a collector's shelf or your Lucite end table. Everything's carefully labeled, and the owner, Donald, will happily advise newbies or talk shop — and trade specimens — with seasoned hobbyists. He does custom gem-cutting work too. Bring the kids; they'll love rummaging for treasure in the basket of free rocks by the door.