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- Commonly associated minerals are pyrolusite, cryptomelane, manganite, psilomelane, quartz, feldspar and calcite.en.wikipedia.org
- Most psilomelane is not pure romanechite, so it is incorrect to consider them synonyms.en.wikipedia.org
- As an ore of manganese it is much less abundant than pyrolusite or psilomelane.en.wikipedia.org
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