Mixed Metal Steampunk Gear Necklace I love the industrial look of this mixed necklace. I made this pendant as an ode to my 30 years in the travel industry. Gears, sprockets and propeller layered onto a copper form that I cut, textured and patina. Multiple levels create a 3D effect. The necklace measures 24 inches with a hand wrapped mixed metal chain. This is a one of a kind treasure.