I can guess at a few things:
- Resources will follow the more common formats in rarity/complexity. If we assume the order listed is from higher skill to the lower skills, then it looks to be the very common Copper, Tin, Bronze (assumption blended Copper and Tin) Silver and Iron.
- Smelting gives us skill ups
- The complexity of the Jewelry options will be interesting to find more about. Example I want to make a New necklace. It seems I have some chain options, settings options, hook options, etc. Can I mix my metals? Will a Silver chain along side a Bronze setting give me a different option than both Bronze or both Silver? Will it just modify the stats? Will it just modify the level requirements?