Why Rhodium?

Rhodium is an excellent conductor of electricity, it resists oxidation, has low and stable contact resistance, and high corrosion resistance.

Waste of money. Recently rhodium commodity prices have sky rocketed, so it falls into the hi-end trap of 'more expensive, must be better'. A friend, who is a material scientist with a PhD, tells me its electrical properties suggest it worsens current flow. You figure.

Buconero, you'd better have your friend call George Cardas and tell him, since he is pretty big advocate of Rhodium...

I work at a steel mill and just called our head metallurgist and asked him. He said that Rhodium is a very good conductor.

Maybe the more appropriate question is, when comparing a Porter Port which is unplated Copper against an Oyaide or other recepticle made with Rhodium, among other alloys, does the Rhodium outperform the Copper in terms of neutrality, or does it color the resulting signal like we all know that the Oyaide recepticles do.

Is the coloration a characteristic of Rhodium? Is it a characteristic of Copper? Or does the alloy matter?