It commonly occurs with galena, tetrahedrite, sphalerite, chalcopyrite, pyrite, stibnite, zinkenite, siderite, quartz, rhodochrosite, dolomite and barite.
en.wikipedia.org The mineral occurs in cavities in sedimentary iron and manganese deposits in association with arsenoclasite, shigaite, hematite, hausmannite, triploidite, barite, and manganoan ferroan calcite.
en.wikipedia.org It occurs associated with aegirine, riebeckite, barite, fluorite, albite, phlogopite and magnetite.
en.wikipedia.org Lead, copper, zinc, barite, haematite, tungsten, graphite, fluorite, and coal have all been mined at different times since as early as the 12th century.
en.wikipedia.org It occurs in hydrothermal deposits associated with sphalerite, pyrite, chalcopyrite, barite and marcasite.
en.wikipedia.org