to beneficiate of siliceous manganese ore. List Common Oxide Minerals - Mineral Processing Metallurgy. Wad, or bog manganese is a brown, soft, earthy manganese ore, variable in composition ; it looks like bog iron ore, but is often darker, and is often found with pyrolusite Asbolite, or earthy cobalt ore, resembles wad, but contains cobalt, sometimes enough to make it a cobalt ore .