I am completely holding out for a milled iridium-osmium (or iridium-titanium) alloy for the most temperature -resistant,
chemical-resistant, totally scratch- and wear resistant pistol grip ever made by man. You could dissolve your entire pistol in acid, and the grips would still remain untouched.
An element in the platinum-related series of metals, it's silver-white sheen would go well with all but the Stealth Rohrbaughs, and would be particularly attractive with hard-chrome plated R9's.
Quoting the Wikipedia article:
"Although it is one of the rarest elements in the Earth's crust, with annual production and consumption of only three tonnes, it has a number of specialized industrial and scientific applications. Iridium is employed when high corrosion resistance at high temperatures is needed, as in spark plugs, crucibles for recrystallization of semiconductors at high temperatures, electrodes for the production of chlorine in the chloralkali process, and radioisotope thermoelectric generators used in unmanned spacecraft."
Well, s**t, how much more exotic do you want your grips to be?

Minor problems in that it's virtually unmalleable, hard as h**l ,
doesn't melt until 4471 °F, and costs about the same as platinum, but we've gone pretty far off on the aesthetic theme of this topic, so for fun I thought I'd throw in something that would look terrific, be completely unique, cost a fortune, and that you'd probably have to hire someone associated with NASA to produce. What else could a collector ask for?
