Promethium ore can be found in the Sinkholes Distraction and Diversion. When ores are the required resource, Promethium rocks are sometimes scattered throughout the sinkhole dungeon. They require 90 Mining to extract ore from, and give 148 experience. The ore mined from them can be deposited at chutes or in the starting room to make progress towards the resources objective. When there rock sparkles, it will give two ore per attempt instead of one. Unlike normal promethium ore ore, this ore does not stack in your inventory.