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  • a glass chalice, the Lycurgus Cup.
    Rights: Johnbod Published 30 November 2013 Size: 50 KB Referencing Hub media

    This glass chalice, the Lycurgus Cup, appears jade green when lit from the front but blood red when lit from behind. The colour change is a result of the Roman artists impregnating the glass with nanoparticles of silver and gold.

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