What I suggest is to make it so that they have a noticable price. Something like 6 or 12 gp for silver ignots... with silver rings 2 or 4 gp each and the amulet silver 6 or 12 gp. (Just throwing out numbers here)
Now I understand if you guys don't want to make crafting profitable at all to NPCs... but the way the server is set up, only some moderately leveled PCs have any chance of obtaining silver. Yet it just seems... silly that there is literally... only one IG use for silver (Making "pretty" silver rings/amulets [It should also be noted that, execpt for a few folks who are not currently active on the server, pretty much no one makes silver jewerly as well... but now this gives me the idea of getting Vincent in on this money making idea