I'm loving this necklace made from little chunks of reclaimed farm machinery. There's something almost perfect about it. Simple, modern, industrial, and even a bit romantic, but not something any DIY maven could easily reproduce. The Steel Fork has more necklaces and earrings, too. A portion of their jewelry sales goes to support sustainable agriculture. If you want larger ornamentation, they also sell furniture made from vintage tractor parts.
Images from The Steel Fork.