[ noun ] a mineral consisting of manganese carbonate; a source of manganese <noun.substance>
Rhodochrosite \Rho`do*chro"site\, n. [Gr. "ro`don the rose + ??? a coloring.] (Min.) Manganese carbonate, a rose-red mineral sometimes occuring crystallized, but generally massive with rhombohedral cleavage like calcite; -- called also {dialogite}.