Nickel content is higher in the saprolite zone although cobalt is an important by-product of the limonite horizon.
en.wikipedia.org In other cases quartz and iron oxides, limonite, goethite, and jarosite, exist as pseudomorphs replacing the pyrite and primary ore minerals.
en.wikipedia.org It occurs as a secondary mineral in copper deposits in association with olivenite, chalcophyllite, clinoclase, cornwallite, strashimirite, malachite, cuprite and limonite.
en.wikipedia.org Its name is derived from the extensive deposits of limonite (iron ore) once mined here.
en.wikipedia.org Associated minerals include malachite, olivenite, quartz, limonite, adamite, azurite, and brochantite among others.
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