holymace wrote:
what about silver?
Unfortunately you can't really grind for silver, gold, or truesilver. Silver is a rare spawn of tin mines, gold is a rare spawn of iron mines, and truesilver a rare spawn of mithril mines. What this means is that if you keep mining tin, occasionally one of the nodes will respawn as silver instead of tin.
There seem to be a few exceptions to this - I have occasionally seen gold or silver where I expected to find mithril and I believe silver where I expected to find iron, so it's possible that the precious metals may be even a little more random than I've indicated.
good luck