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)
'''How Mining Skill Affects Max Ore QL:''':
By Dirk (11/11/22)
I posted some data here: https://www.wurmpedia.com/index.php/Talk:Mining#Mining_Bonus_Data_Max_Quality
Too Long Didn't Read: The higher your skill, the smaller the bonus is from rarity and mining imbue.
You can use these equations to find the skill (x) at which you will get a particular max ql of ore (y). Just plug in whatever value for x and solve for y to get the skill you need to get that ql ore or vice versa.
Rare (no imbue): y=0.5861x+41
Supreme (100 imbue): y=0.9187x+7.9445
== Adding a rare item to an unfinished item as the last item ==