Hedron Lattice: Stealth Pin CitrineOrderly in design and concept, the Hedron Pin creates a sense of tranquility through phasing out mental noise and consequently recognizing the inner workings of the world. Handmade with Sterling Silver. The Black Metal or Stealth Sterling as I like to call it is made through simple chemistry. I am basically using a jewelry patina which speeds up the natural oxidation process of the silver and turns it black. The black color is not permanent,