Add these to your current mixed media jewelry pieces! There are artists using them in their recycled works as tube rivets, bezels and more! Fill them with resin, polymer, saw them open, embed parts of them, make molds, etc.
These are actual spent shell casings from the deserts of Taos, New Mexico. Think of how great it is that the desert has been cleaned of trash and the material can now be recycled. They are patinaed from age, and are not free from a little dust (really authentic).
Not to mention that you'll be in perfect style with fashion trends!