Mangano Calcite: (Ca,Mn)CO3.
A calcite rich in manganese. Calcite, which gets its name from chalix the Greek word for lime, is a most amazing and yet, most common mineral. It is just the right amount of manganese and sometimes Lead which helps calcite fluoresce Pink.
Calcite is so abundant and widely distributed it is no wonder that it can be so varied. The crystals of calcite can form literally a thousand different shapes. By combining the basic forms of the positive rhombohedron, negative rhombohedron, steeply, moderately and slightly inclined rhombohedrons, various scalahedrons, prism and pinacoid to name a few of the more common forms. There are more than 300 crystal forms identified in calcite. Calcite also produces many twin varieties, they are favorites among twin collectors. There are also phantoms, included crystals, color varieties, pseudomorphs and unique associations. There simply is no end to the varieties of calcite. Red and pink fluorescent Calcites are often activated by a team of lead and manganese.