Rhodochrosite is a manganese mineral that makes an interesting gemstone due to its distinctive raspberry red and pink stripes. Due to its composition, rhodochrosite is also referred to as manganesespar or as raspberryspar with reference to its color.Rhodochrosite is generally opaque, though transparent crystals are seen. Transparent crystals are usually heavily included. When polished, rhodochrosite has a vitreous, resinous or pearly luster. Rhodochrosite is the national gemstone of Argentina and the state mineral of Colorado, due to significant deposits being discovered in both places.