The Gemmi Fault is a northwest-southeast trending strike-slip fault which crops out over a length of and features an offset of at least . It is characterized by a conspicuous, up to high offset in the landscape between the Daubensee northeast of the fault and the Daubenhorn southwest of it. The trace of the fault is perpendicular to the folding trends of the surrounding terrain. A damage zone surrounds the fault trace and is up to wide; it is characterized by broken calcite fragments, cataclasite and veins produced by fluid flow within the fault. Joints in the rock of the area are focused on the fault and show evidence of movement.