Black bronze
Encyclopedia
Black Bronze may refer to
  1. Hepatizon
    Hepatizon
    Hepatizon , also known as Black Corinthian Bronze, was a highly valuable metal alloy in classical antiquity...

    , also known as Black Corinthian Bronze
  2. Shakudō
    Shakudo
    Shakudō is a billon of gold and copper , mostly designed for its dark blue-purple patina. It was historically used in Japan to decorate katana fittings such as tsuba and kozuka...

    , a Japanese decorative billon
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