Coatings of retgersite seen in occurrences near Vein 51 may easily be removed by washing in water.
Retgersite was identified in 1993 on specimens of gersdorffite from Vein 51, Ait Ahmane.
This former nickel mine is the type locality for heazlewoodite and hellyerite, and the source of many rare minerals, including awaruite, dypingite, retgersite, reevesite, theophrastite and several new, unnamed minerals.
The rare nickel mineral pecoraite has been identified on only one specimen, where it occurs as a dark green crust on serpentine with small blue retgersite crystals.
Retgersite occurs as pale to medium blue crystals and crusts on serpentine.
The retgersite and unnamed Ni-Fe sulfate appear to be rather restricted in distribution, possibly to areas of low water flow.
There are, however, many minerals in common and the more interesting of these include the secondary minerals: gaspeite, otwayite, reevesite, retgersite and zaratite.
Native Elements Halides, Oxides & Hydroxides Awaruite Atacamite * Unnamed Bi-Ni-Fe-Pt alloy + Brucite * Unnamed Au-Cu alloy + Magnetite Theophrastite Sulfides Covellite * Arsenates, Sulfates Digenite * Annabergite + Heazlewoodite Retgersite * Millerite Unnamed nickel iron sulphate + Molybdenite * Pentlandite Polydymite * Carbonates Pyrite + Dypingite * Pyrrhotite * Gaspeite * Violarite + Hellyerite Magnesite + Otwayite + Pyroaurite * Reevesite * Zaratite Native Elements Silicates Awaruite Andradite Unnamed Bi-Ni-Fe-Pt alloy + Antigorite Unnamed Au-Cu alloy + Chrysotile Clinochlore Sulfides Diopside * Covellite * Enstatite + Digneite * Glossular + Heazlewoodite Lizardite Millerite Opal Molybdenite * Palygorskite * Pentlandite Pecoraite * Polydymite * Stevensite (or Saponite?
Carbonate Zone Minor Phases Rare Phases Upper paratacamite, carrboydite, kambaldaite, annabergite, glaukosphaerite, azurite, lavendulan, hydrohonessite, retgersite, nepouite, nullaginite, pyrolusite, huntite, olivenite, otwayite, aragonite, calcite, pecoraite pharmacosiderite, [+ or -] dolomite reevesite, takovite, widgiemoolthalite Lower paratacamite, dolomite, kambaldaite huntite
Minor traces of retgersite, azurite, magnesite and pale green gaspeite have been found along microfractures in some gossan samples.
Retgersite occurs as a minor phase, often associated with goethite, at the top of the violarite-pyrite zone.