Making metal transparent

[starslayer]

Originally Posted by Anthony

Al2O3 is transparent in crystalline form (corundum; with dopants, forms ruby or sapphire), though in powder form it's white. Same for cubic zirconia.

Good point, but I don't think all but the most reachy of munchkins will try to argue that corundum, ruby, or sapphire should be affect-able with control metal nor count as a 'metal' in the most traditional sense.