Bark from the gold leaf trees of Lydr Olhmut during fall. Autumnbark is highly prized in crafting wooden structures and buildings due to it's ability to absorb magic and continue to grow.
Diamonds that have been folded magically in a crystech crucible to produce a type of alloy that cannot physically be broken. The process is intense and requires incredible amounts of material to refine down into small amounts of Diamascus so armor will have Diamascus plates but will not be fully made of the material.
Wispy tufts of fluffy clouds that form near the ground in Adrem that is only cotton in name for its appearance. It's actually the leftover dreamstuff from when Meticiem craft dreams or nightmares. It's extremely malleable and can be as soft or dense as the shaper needs it to be. Once a form is set for it, that's how it is permanently.