We've seen some zipper jewelry before, and Etsy seller toniandtree does a great job bringing even more creativity to the idea. The brooches featured on the site are original pieces that incorporate the zipper into the design.
Zipper jewelry always looks cooler than its closure competitors. Button jewelry is cool, but the creativity involved in zipper jewelry makes it more interesting. The fact that toniandtree uses recycled zippers makes these extra cool.
Implications - My favorite piece of the bunch has got to be the skull-adorned heart zipper piece as its punk mentality totally matches my fashion sensibilities completely. Rock on ladies and gentlemen!