The classical structure-related hydrothermal nickel deposits of the
Ni vein-type (Ag-Bi-Co-Ni-U association or Five-element Formation) with terms coined in the Erzgebirge, Germany /Krušné hory, Czech Republic is a bonanza for mineral enthusiasts but no longer in the forefront of Ni mining which lies in the basic and ultrabasic host rocks (N America) as well as their supergene alteration zones the Ni-(Co) laterites all of which have metals such as PGE and Cu accompanying Ni and, thus, rendering the deposits of more economic interest in terms of size and grade. The primary basic and ultrabasic types also have hydrothermal vein-type off-shoots which significantly differ from the Five-Element-Formation.