I thought level 2 caves had minimum quality of 20 for everything... Was that changed? Cuz I'm digging q16 stones there with 32q pickaxe and 65 masonry...
The Ore nodes are all random to a certain extent such as minimum and maximum thresholds, ive seen q 23 on level 3 and q 50 on cave level so im guessing atm from my experience the minimum for every level is 10 and each level increases ore chance maximum.