Rhodochrosite is a manganese carbonate mineral with the chemical formula MnCO₃. It is most known for its striking pink to red color, often with lighter pink or white banding. The color variation is due to the presence of manganese. Rhodochrosite has a Mohs hardness of 3.5 to 4, making it relatively soft and best suited for decorative use or jewelry where it is protected. It forms in hydrothermal veins and manganese deposits, often in association with other minerals like calcite. Major sources include Argentina, the United States (Colorado), Peru, and South Africa. Rhodochrosite is highly prized for its vibrant color and is commonly cut into cabochons or used in ornamental carvings.