Mining skill is acquired through practical experience of mining, tunnelling, and excavating. Characters with this skill gain certain advantages when moving about in the underground world. They are able to tunnel using appropriate tools and are capable of constructing supports, floor planking, and bridging and walling where the earth is soft. They should receive a +10% modifier to Construct tests for such tunnels.
Once underground, they can recognise most mineral ores, rock types, and gem-bearing rocks. Where valuable minerals or gems occur as part of the natural rock formation, characters with this skill will usually notice them. The gamesmaster can test against Int to determine success.
These characters also have a +10 modifier on the normal chance of noticing secret doors and concealed passages in underground complexes. Whilst underground, they can sense changes in direction, ground slope, temperature, and humidity. The gamesmaster can use these traits to help players where appropriate.