I'm not adding mithril per se. As in, it's not something you could really "delve" for. It's a funny alloy of silver, aluminum, and iron, called "silversteel". It takes a bar of each, plus flux and fuel, to make 3 bars of the stuff. Its worth is not "thrice that of gold", mainly because there is no super-rare ore to link it with (except aluminum...), but I left it at thrice the price of steel. I think about various ways to use silversteel thread (as in, ways that could not be achieved with bars), but the current interface does not allow using metal cloth as normal cloth (at least in a clothesmakers - I'll see what the forge has). The actual properties of it are
slightly better than that of steel, and its weight is almost a quarter of steel's.
I don't know whether a silversteel anvil is an altogether sound device - I mean, it's all good for strength, but isn't it too light to, realistically, work on it?
In other news, today I've lost a fort to the aftermath of my modding attempts. Well, actually, I've lost an entire world to that. Y'see, I was trying to make gemstone golems for the Martial arts mod, and experimented with renaming files to make custom matglosses. That particular idea failed, but it left a hidden error, that made a blacksmith of my fort go berserk after wanting to get gemstones... After a quick rally to defeat him (I was rather sure I could find at least one in time, so didn't bother with defence), I ran a reveal.... sure enough, not a single gem in the entirety of the site. I kinda forgot to rename the mat_stone_gem raw file back to what it was...