Pay-dirt - OSRS Wiki

Pay-dirt is obtained whilst mining ore veins within the Motherlode Mine. Mining pay-dirt grants 60 (up to 61.5 with full prospector outfit) Mining experience and requires a minimum Mining level of 30. Pay-dirt can be cleaned by depositing them into the hopper in the centre of the mine. Once cleaned players must search a sack to claim their ores, which is dependent on the player's Mining level. Pay-dirt cannot be deposited in the bank.

Clay, Old School RuneScape Wiki

Rock (elemental) - OSRS Wiki

Mining, Old School RuneScape Wiki

Catherby - OSRS Wiki

MLM Idea: Can we pay the dwarves in pay dirt to carry it to the hopper for us? E.g.: They'll carry 3 pay dirt to the hopper for 1 pay dirt, so for an invy of pay dirt, you'd pay 7 and be able to pick up 21 ores from the sack.

Small Boulder - OSRS Wiki

Clay - OSRS Wiki

Basalt - OSRS Wiki

Hopper (Motherlode Mine) - OSRS Wiki

Prospector helmet, Old School RuneScape Wiki