Pathfinder Elder Scrolls Conversion: Special Materials
The suggestions praguepride puts forth were mostly what I was originally considering, but Adamantine and Mithral, which they used for Elven and Ebony, are already canonical materials in TES.
The latest two games in the main line, Oblivion and Skyrim, severely cut back on the weapons, armors, and materials, and that's something I'm looking to avoid.
I am considering using the Dwarvencraft template from 3.5 to represent Dwarven weapons and armor. I may end up doing a similar homebrew for Elven items, since I don't really believe "Elven" should be its own material. In Skyrim, it's constructed from "quicksilver", which I assume is good ol' Bethesda inconsistency for mithril, and refined moonstone, so I think it'd be similar to Pathfinder's mithral. Since I'm also going to be using mithril/mithral as a material, and Elven armor was superior in TES4, it would likely be more expensive than mithral, possibly restricted to just light armor, and have drastically reduced arcane spell failure, to represent the elven affinity for magic.