I will need you to provide me with examples of "materials that can be found but have not been implemented in the crafting system yet", because crafting components are not added in the module in advance of the craft they relate to. Sure a few drop loot, like certain metal bars, might be confusing, and we are thinking of *maybe* eventually adjusting them, but these are very rare situations.
Also we prefer players to find that kind of answers in game, rather than list possible options in an OOC way. There are plently of crafters in all the crafts that can easily answer you as to the worth of said material for their crafts.