Month: February 2019

  • Relativistic Colors

    Metallium, Inc. is attempting to manufacture coins made from as many different metals (and elements) as possible, typically 99 to 99.9% pure. My Metallium coin collection currently includes aluminum, titanium, iron, nickel, copper, zinc, silver, tin, and gold coins. Most metals are silvery gray because they absorb ultraviolet light and reflect visible light. However, relativistic…

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