MANGANO CALCITE CRYSTAL SPECIMEN
Beautiful fluorescent Mangano Calcite Crystal Specimen. A stunner, this specimen is a lovely pale pink in daylight and as you can see, neon pink fluorescing under UV light. If you only need one piece of this mineral, this would be an excellent choice. Step your collection up a level with this super Bulgarian crystal. This is a rare, top quality calcite crystal specimen. The specimen is mounted on a perspex pad for enhanced display.Pics are taken under different lighting including UV longwave fluorescent.
13.7cm x 3.5cm x 14cm, 677g.
CaCO3, Calcium Carbonate.
Calcite, which gets its name from “chalix” the Greek word for lime, is a most amazing and yet, most common mineral. It is one of the most common minerals on the face of the Earth, comprising about 4% by weight of the Earth’s crust and is formed in many different geological environments. Calcite can form rocks of considerable mass and constitutes a significant part of all three major rock classification types. It forms oolitic, fossiliferous and massive limestones in sedimentary environments and even serves as the cements for many sandstones and shales. Limestone becomes marble from the heat and pressure of metamorphic events. Calcite is even a major component in the igneous rock called carbonatite and forms the major portion of many hydrothermal veins. Some of these rock types are composed of more than 99% calcite. Why would a collector be interested in such a common mineral? Its extraordinary diversity and beauty!
With calcite so abundant and so 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 and these forms can combine to produce the thousand different crystal variations. Calcite also produces many twin varieties that 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.
Check out Fluorescent Mineral Society for more on Fluorescence.