lot hand blown glass oil lamp bases, witch ball style globes iridescent green, blue & white swirl

Lot of three hand blown glass oil lamps - nice and clean, no wicks or oil residue. All three balls look good, no chips or cracks. No makers marks or signatures that I could see, I'm not sure of the exact vintage on any of these.

Two are swirled white with green or with blue, these are both flat on the bottom. The green carnival glass ball is round, maybe had a stand originally? Or maybe it's just a decorative piece. It's colored glass with an iridescent color, not painted.