[ Economy Treatise | Advanced Item Manufacturing | Named Items ]
A valuable addition to smithing would be jeweled weaponry: a smith could use jewels in the manufacture of new weapons. The smith would be making the blade sharper or otherwise more dangerous by incorporating ground-up gems in the molten metal; certain gems might even give the sword a very slight hue. The result would be something like "a diamond viking sword" which would have the same damage modifier as, say, a low-to-mid-level magical sword. Such swords would be impossible to repair, and brittle. The "enchantment" level (the +damage) would vary depending on the number of gems used in the manufacturing process. A diamond blade equivalent to weapon "of force" might require 20 diamonds, and of course it would be hard to make, potentially requiring the smith to use up 50 or 100 diamonds -- meaning the sword would have a value in the several-thousands-of-gp, at the least, just to an NPC (i.e. not even considering the damage bonus). Cheaper gems would result in less-powerful weapons but might look fancier (a slight ruby-red tint, for example).
The implementation could be handled by automatically checking for the existence of gemstones in the smith's pack during the manufacturing process; if they exist, the jeweled weapon is listed along with the normal variant in the smithing menu.
A variant of jeweled weaponry would allow inlaid jewels on items: it should also be possible (and easier than the above) to inlay gemstones into an existing weapon or piece of armor. This would have no effect on the functionality of the item, but would make it more valuable and add interesting text: "a ruby-encrusted viking sword", perhaps, or maybe "a viking sword inlaid with six rubies". This could be handled by allowing tinkering tools (or smithing tools, if that is deemed more appropriate) to be used on gemstones. It might also be worthwhile to allow inlaid gemstones on other items such as rings, necklaces, etc.
The jeweled-weaponry idea has a few beneficial side effects: