rho·do·chro·site 
(rō′də-krōsīt′)
(rō′də-krōsīt′)n.
A mineral consisting mainly of manganese carbonate, MnCO3, light pink to rose-red in color with a pearly or vitreous luster, used as a manganese ore.
[German Rhodochrosit, from Greek rhodokhrōs, rose-colored : rhodo-, rhodo- + khrōs, color.]