The Black Diamond area is underlain by limestone of the Lower Cambrian Badshot Formation and metasediments of the Cambrian to Devonian Index Formation (Lardeau Group) consisting of schist, phyllite, quartzite, slate and limestone.

The Black Diamond group of three claims is located at the headwaters of Silver Tip Creek, which empties into the Westfall River. Two ledges, lying between slate and limestone occur. On the upper vein a crosscut is run and passes through the ledge at a depth of 9 metres, where the vein is found to be 1 metre wide, with 20 centimetres of galena and 10 centimetres of copper ore on the wall. The grade of the carbonate ore is reported to be especially high. On the lower ledge the vein is stripped for about 60 metres. The ledge is about 1.5 metres wide, and has about 23 centimetres of ore, principally carbonates. This group was the property of the Silver Tip Mining Company of Rossland. A shipment of argentiferous galena was recorded in their name in 1899. The claims were Crown-granted in 1902 but have since lapsed.

During 2006 through 2009, Mineral Mountain Resources Ltd. completed programs of prospecting, geochemical (soil, silt, talus fines and rock) sampling and an airborne geophysical survey on the area as the Kootenay Arc property.