There is only one way to craft an item, but all items can be crafted without a recipe.
Thus, it is important to know exactly which materials to use to craft an item because 
you will lose the ingredients if you do not combine the correct materials to create an
item. Most crafted items are only good for selling, but there are some specialty items
that can be crafted that will create unique weapons and upgrades. Most specialty recipes
can be found in treasure chests in outdoor areas. The specialty items can be crafted at
any time as long as you have the required material(s) and artisan level(s). Some artisans
will only gain levels at certain points in the game; thus, you may have to wait until 
later in the game before certain specialty items can be crafted. Additionally, specialty
items sometimes require special materials to construct.