|This article is about the crafting resource. For the Developer and Publisher of UnderMine, see Thorium Entertainment.|
|A resource found in blue chests and used to purchase items or unlock relics after finding blueprints.|
Thorium is a currency in UnderMine. It may be found in blue Chests or in statues in Delvemore Dungeon. It may also be found when peeping at a Skeleton. Thorium is used to craft Potions, Relics, Blessings, and hatch Familiars in The Hub. Items that are more powerful usually cost more Thorium.
It can be picked up with a thrown pickaxe if the player has bought Gecko's Foot. Up to 999 Thorium may be carried; picking up more will consume it without adding it to the count. It disappears if it is not collected before exiting the room.
|Thorium nugget sizes|
|- Thorium gem with value of 1|
|- Thorium gem with value of 3|