Since I'm working on expanded treasure charts, mining tables for Mineral, and the like (I don't care if the substance is native only to the Prime, Outer Planes, or a different Inner Plane).
So far I have the following:
--Adamant (Volo's guide to all things magical and the like)
--Arenite from Anauroch
--Baatorian Green Steel
--Brightice from Inner Planes
--Corals and kelps from Sea of Fallen Stars
--Eternal Ice
--Liquid Fire (Al Qadim: Caravans)
--Metals and gems from Volo's Guide to All Things Magical
--Vividium from Inner Planes
--Woods from Volo's Guide to All Things Magical
I also have Shadowstone *Astromundi* and Nephelium *Firestorm Peak* referenced by source, but not page or chapter.
What else did I miss?
Damn, where's Rip when you need him?