Romanechite occurs in many manganese deposits, though most often in uninteresting habit and not necessarily identified. The type locality for Romanechite is Romanèche, Saône-et-Loire, France. Other important localities include the Clara Mine, Oberwolfach, Black Forest, Baden-Württemberg, Germany; the Adam Heber Mine, Neustädtel, Schneeberg, Saxony, Germany; and an unspecified locality in Pinal Co, Arizona which has recently been producing nice specimens.

Hematite - Has a red streak.

Goethite - Yellow streak, lower specific gravity, usually a darker color.