How to craft things ?
As a general rule, Jewelers only use “precious metals” in their crafting. This means they use Copper, Silver, Gold, Platinum and Mithril and Orichalcum at higher levels. They do not use Bronze, Iron, Steel or Darksteel.
To craft jewelry, you first need to craft the components for a jewelry item (e.g. Copper Band, Copper Setting), and then combine those components with a gemstone or jewel of some kind. If you don’t want to craft the components yourself, you can also buy the components off the Trading Post.
Jewelry, like all crafting items, have Tiers that correspond to a level of skill. If your skill rank isn’t high enough, you won’t be able to craft an item. For example, Copper jewelry can be crafted from ranks 0 onward, but you won’t be able to craft Silver jewelry until your rank is at least 75.