| Acicular crystals and crystal aggregates of pyrolusite are found in vugs in the pegmatites of the district. |
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| Scheele produced chlorine by treating the mineral pyrolusite with hydrochloric acid. |
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| It never occurs as a free element, but only in ores such as pyrolusite, manganite, psilomelane, and rhodochrosite. |
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| The granular pyrolusite can be used both in pressurised and unpressurised systems. |
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| Because pyrolusite is not used up during the deferrisation it offers an economic advantage compared to other deferrisation-materials. |
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| For years we have successfully used pyrolusite for the catalytic deferrisation and demanganisation of ground and process water. |
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| It was recognized as an element in 1774 by the Swedish chemist Carl Wilhelm Scheele while working with the mineral pyrolusite and was isolated the same year by his associate, Johan Gottlieb Gahn. |
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| Other minerals from the sedimentary rocks include pyrite, calcite, barite, manganite, and pyrolusite. |
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| The manganese, which is in the form of pyrolusite, would be removed in a proposed rare earth separator circuit installed at the mine's iron ore concentrator. |
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| Found at mont Saint-Hilaire a few decades ago, there was some questions about its identity and this species had originally been designated as pyrolusite. |
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| Ukwa Braunite, Hollandite, Pyrolusite Manganese Phyllite, Hematite, Quartz and Apatite. |
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