Silver Jewelry Supplies
SilverJewelrySupplies.com has excellent commercial potential. It will go nicely with The Silversmiths Handbook site and the same people that want to read about silver smithing should also be in the market for silver supplies.
I can imagine monetizing the site with ads from companies which are already in the silver supply business as well as some potential for a startup. It might also make a side income for a jewelry maker to generate some side income while they grow the artistic side of their work.