Wad (mineral)

For other uses, see WAD (disambiguation).

Wad is an old mining term for any black manganese oxide or hydroxide mineral-rich rock in the oxidized zone of various ore deposits. Typically closely associated with various iron oxides. Specific mineral varieties include pyrolusite, lithiophorite, nsutite, takanelite and vernadite.^[1] Wad can be considered to be the manganese equivalent to the iron mineraloid limonite.