Mineral Class: Carbonate
Crystal System: Trigonal
Luster: Vitreous to Pearly
Diaphaneity: Transparent to Translucent
Colors: Wide Variety of Colors
Source: Worldwide (including Brazil, Pakistan, Peru, UK, and USA)
Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate. Calcite’s name comes from the German “calcit” coined in the 19th century from latin for limestone. The word is somewhat related to chalk. Calcite can convert to aragonite in a matter of days depending on the temperature variants. Calcite is a very widespread and well-known mineral that comes in many forms and colors. It is known for its low Mohs hardness and is very abundant in the Earth's crust. It is found in sedimentary rock. Calcite contains carbon, calcium, and oxygen which are collectively known as calcium carbonate. It is usually mined from deep underground or quarried from the surface of the Earth.
Calcite can take many forms including rhomboidal or prismatic crystals, as compact granular masses such as onyx, limestone, or marble. In its fibrous form, it is alabaster. A doubly refractive stone, it splits light entering the stone in two, so everything reflected appears as double. Many of the artifacts of the Ancient Egyptian empire were created from Calcite. The properties of Calcite make it one of the most widely used minerals. It is used as construction material, agricultural soil treatment, pigment, pharmaceutical and more. It has more uses than almost any other mineral.