Mineral Species: Manganoan Calcite

Chemical Formula: (Ca,Mn)CO3

Chemical Name: Manganese Calcium Carbonate

Mineral Class: Carbonate

Mineral Notes: Managnoan Calcite or Manganocalcite is a mineral in which a proportion of the Calcium atoms have been replaced by Manganese. The amount of Manganese varies between locations and therefore the mineral forms a solid solution series between Calcite and Rhodochrosite. The transition metal gives the mineral its attractive pink colour. As a result the mineral is highly sought after and matrix specimens are often carved into ornaments and display pieces.

Description: A very highly crystalline specimen of Manganoan Calcite showing excellent rhombohedral form. Some of the crystals are quite large. The colour is a pale pink due to the Manganese. Together with a very bright pearly luster this is a very attractive display specimen.

Location: Kapnikbanya, Romania.