low-conductivity, high-reflectivity metals

Which metals/alloys are recommended for applications which require low electrical conductivity, but high sheen? Specifically, this
application involves a decorative molded piece of metallic appearance in an electically "live" environment.
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Googleplex wrote:

Why does it have to be a metal?
Conductive polymer resin with standard metallized shiny surface.
Fairly common and moderately cheap too.
Why does it have to be a metal?
And what is a low enough conductivity anyway?
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