Kutnohorite is a rare calcium manganese carbonate mineral with magnesium and iron that is a member of the dolomite group.

It was named by Professor Bukowsky in 1901 after the type locality of Kutná Hora, Bohemia, in the Czech Republic.

Kutnohorite occurs as aggregates of bundled blades of white through rose pink to light brown crystals.

[9] At the Eldorado Mine, Ouray County, Colorado, US, it occurs as tiny white crystals partially encrusting quartz and dolomite.

[10] At the Ryujima Mine, Nagano Prefecture in Japan, magnesian kutnohorite occurs with quartz and rhodochrosite.