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  • Funeral mask of the Pharoah Tutankhamun
    Podcast

    Lazurite

    2019-02-15T12:09:00Z

    A brilliant rich blue rock, prized in antiquity as a gemstone and a prominent pigment, lazurite is the basis of lapis lazuli, the original ultramarine paint and – as Brian Clegg finds – it even adorns Tutankhamun's death mask

  • Gold panning - Hero
    Opinion

    Time to act on conflict minerals

    2017-05-22T08:44:00Z

    We must end the human cost of tin, tungsten, tantalum and gold