It occurs in association with : zincite, willemite, franklinite, rhodonite, jacobsite, diopside, gageite, bustamite, manganocalcite, glaucochroite, calcite, banalsite and alleghanyite.
2.
"' Manganoan calcite "'or "'Manganocalcite "'is a variety of calcite rich in manganese, which gives the mineral a pink color.
3.
The amount of manganese in manganocalcite varies at different localities, and the mineral forms a solid solution series between calcite and rhodochrosite, with the color becoming redder with a higher proportion of manganese.
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