My mining skill has always been far behind my primary skill which is quarrying.
I have not hit Tier4 Quarrying ( Limestoen ) and im still stuck at iron with mining.
There can be lots of explanation for this, like stones being more common in some areas than nodes. However I think I in general have ssen as many node as I have slabs, so therefore my oppinion on it.
If someone else is experiencing same, or something diffirent speak up
