jewelry qualities

[Kearn]

does anyone have an understanding of how exactly jewelry quality calculations work? i've noticed that anything involving a goldbeater's skin to date has been a higher quality than the skin by a noticeable margin, even if the goldbeater's skin is the only non-precious metal component. i've tried a few basic formulas to factor in potential stuff like the anvil/smithy's hammer but i haven't managed to figure it out yet

i was under the impression that stats only affected softcapping but perhaps this is not the case

[Fostik]

Precious metals have no q, so they are not calculated in formulas.
If you have only 2 component craft, for example ring, quality will equal skin quality.
But you need anvil & hammer, what's mean final qauality will be caltucated with average quality with anvil and hammer.

q10 goldbeater skin, q70 anvil&hammer will make q40 ring.
Rings of brodgars will have less quality from pearls, and occults ring will have more, because of hight q coal.