Rhodochrosite is a manganese carbonate mineral. In Rhodochrosite's pure form, it is typically a rose-red color, but impure specimens can be shades of pink to pale brown. Rhodochrosite is Argentina's "national gemstone".Colorado officially named rhodochrosite as its state mineral in 2002. Rhodochrosite is rated between 3.5 and 4 on the Mohs hardness scale. Rhodochrosite is thought to increase activity and enhance sexuality, as well as open spiritual insight and understandings.