It occurs associated with apatite, whitlockite, childreniteeosphorite, laueite, strunzite, stewartite, mitridatite, amblygonite and siderite.
en.wikipedia.org It occurs with cylindrite, teallite, plagionite, zinkenite, cassiterite, wurtzite, pyrrhotite, marcasite, arsenopyrite, galena, pyrite, sphalerite, siderite and stannite.
en.wikipedia.org The name is said to have been coined by ironstone miners who once worked the siderite deposits which stratigraphically overlie this rock unit.
en.wikipedia.org It occurs associated with whitlockite, vivianite, triploidite, triplite, triphylite, siderite, phosphoferrite, fairfieldite and apatite.
en.wikipedia.org It commonly occurs with galena, tetrahedrite, sphalerite, chalcopyrite, pyrite, stibnite, zinkenite, siderite, quartz, rhodochrosite, dolomite and barite.
en.wikipedia.org