This is a gold/silver mask believed to cover the face of the adult in the coffin of the Samdzong 5 tomb complex, Upper Mustang, Nepal. [Credit M. Aldenderfer]
Sounds like a wonderful place to put on one's bucket list.
I was listening to the history of chromatography on the "In Our Time" podcast last week. The host, Melvyn Bragg, mentioned a book he was reading that discussed dyes around the time of these fragments. An illuminated manuscript in Europe had 90 different colors in it, all originating from plant dyes. It is remarkable how these people used intuitive chemistry to separate colors from pigments.