VERY nice! Wow!! I like the way you're really turning the copper into a design element! On the second one, the free-flowing copper hanger adds a lot of interest (I'd love to see that thing glittering in a window...). The first and third, where the hanger wraps around the horseshoe.. and the third, which adds some wrapping with a different gauge of copper... very nice.
I really like what you've done with the barbed wire in the fourth one. Since it's chunky and dark, like the horseshoe itself, crossing the horseshoe with it instead of having it extend upward from the ends of the horseshoe makes for very interesting lines! The fine copper wire going in and out of it with the amethyst stones attached works very well. The copper winding in the heavier gauge really sets the whole thing off.
Well done!