Hah, yeah. I wish we knew exactly how much a dwarf unit was though.
Warning: tongue-in-cheek "calculation" to follow.Given a rock mug is 13 units, and double that for other stone craft goods, I'd imagine its about a hundred grams, maybe a bit more, depending on how clunky these dwarf steins are meant to be.
Which sort of works, since a rock would then be 80 kg +.
So by that sort of reasoning, the ring would be 700 grams +, which is pretty heavy to wear on a finger. And with ~70 items in its construction, that means each provided about 10 grams (or 0.1 dwarf units, of course).
Metal bars seem to vary from 10 units for the light metals to 150 for the heavy ones.
Gusilgutid seems to have a bunch of silver, nickel and pig iron, so if we said an average of 50 dwarf units a bar, only about 1/5 of each bar is being used in its construction.
Alternatively, if we look at its weight compared to other, plain tin rings, which
also weigh 7 dwarf units, then it would seem that all those other metals are
electroplated on in quantities too small to detect.
Perhaps there are some properties of fish leather, turtle shell and zircon, known only to moody dwarves, that can be used to produce an electrolyte fluid and generate an electric charge.
Either way, if we assume an average 50 dwarf units per bar, and only 0.1 units of each is used, then the moody dwarf must have partaken of an astonishing ~ 60*(50-0.1)*0.1 = 299.4 kg of metal in the course of making the artifact.