Ore veins are found in the Motherlode Mine and are mined for pay-dirt, yielding 60 Mining experience each. On the lower level, veins have a 33% chance of depleting each time an ore is mined, this follows a geometric distribution which gives an expected 3 pay-dirt per vein mined.
The veins also have a chance to give uncut gems. The amulet of glory's mining effect can be used to increase the chance of receiving a gem.
With 72 Mining (cannot be boosted), Prospector Percy can be paid a one-time fee of 100 golden nuggets to be granted permission to the upper level of the mine, which is accessible via the ladder near the bank chest. The upper level contains 64 additional ore veins that are closer to each other compared to the lower level. The upper level veins disappear 15–27 seconds after they were first mined, rather than having a probability of becoming depleted per ore mined.