The ore contained between 0.4 and 3.0% nickel. The ore lay on the underside of a gabbro. The gabbro lay like a giant lens in the quartz-rich gneisses that dominate in the area. It is believed that, a billion years ago, when the gabbro was flowing magma, it intruded into the gneisses. Sulphide minerals, such as for example pentlandite that contains nickel, in addition to pyrrhotite, chalcopyrite and pyrite, were among the first minerals that were formed when the magma gradually began to cool. They sank down to the bottom of the magma and were thereby lying at the bottom of the gabbro.
The lack of profitable ore caused the mine to close in 1945. But, there are still many signs of its operations, and the ore is still visible by the mine shaft at Lake Litlandsvatnet.