I think it depends on at least the mining skill of the user, in my case with 70.88 mining skill i get 72.36 Ql shards, this is a 1.48 increase.
Agreed, it's not linear but it's around the 1ql mark. Even adds onto the tile's max, so if you're mining a 50ql vein you will get ~51ql ore. --[[User:Marni|Marni, Wurmpedia Manager]] ([[User talk:Marni|talk]]) 23:10, 11 September 2015 (CEST)
== Adding a rare item to an unfinished item as the last item ==