Board Thread:General Discussion/@comment-24.247.108.45-20130607213225/@comment-6881629-20130718140743

Don't forget Mithril (not) from the mountains of Moria at least theres no sign of any Unobtainium yet.

Corundum in real life is a crystalised aluminum oxide but as the wiki page and 74.139 say in TES it could be Chromium.