This Specimen has been sold.
4" Botryoidal Rhodochrosite Formation - Argentina
This is a partially polished rhodochrosite stalactite segment, collected from the Capillitas Mine in Argentina. Some of the botryoidal formations have been polished down, displaying the beautifully defined banded formation. The portion of this mine that produced these types of banded rhodochrosite specimens, was mined out decades ago.
Rhodochrosite is a manganese carbonate mineral with them chemical composition MnCO3. The crystals typically have a pink-red coloration and cleaves with rhombohedral cleaving in three directions. It forms from hydrothermal pockets and can be found as both crystals and in banded formations.