Kevin, I have a question from rpg.net http://forum.rpg.net/showthread.php?t=435243
I've seen the Dwarven Stone metal dice: steel, brass, and copper. But I haven't seen any other metals. Presumably because they are too expensive to be implemented. Well, there are other reasons I guess (I imagine lead dice would be pretty dangerous).
But what about silver or gold? Do they exist? I've found 18K gold 6 siders, and they go for about $5K a piece.
Obviously the thing that seems to prohibit the manufacture of solid gold dice is no market. Big difference between a $40 steel d20 and a $5000 gold d20.
But with the extra old gold jewelry I've collected over the years, It wouldn't be hard for me to create molds, melt, and create gold dice (having a father in law who is a jeweler helps).
But then that brings up another question. Would gold dice be too soft to use?
*Edit* Ah, where it appears I've answered part of my own question. Here are some gold plated dice, but no solid gold. I wonder if that's because of the cost and softness of gold?