A type of dark mineral composed primarily of manganese oxides, sometimes found as a coating or stain in rocks and soils.
From Greek asbole meaning 'soot' or 'coal dust' (from a-, without + sbolos, dart), referring to the dark coloring. The suffix -an indicates a mineral type, following geological naming conventions established in the 18th-19th centuries.
The name asbolan comes from the Greek word for 'soot' because it looks like black powder or dust coating rocks—and chemists named it without realizing they were describing a manganese-rich ore that's actually useful!
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