calcite

Calcite crystals come in many shapes and are the principal mineral of limestone, marble, and beautiful stalactites. Travertine can be deposited in spring water, and is often a secondary mineral in igneous rock. In almond holes of basalt flow, calcite is often filled in the cracks of sedimentary rock to form veinlets, or through biological action, in the form of shell or rock reef.

calcite

Calcite (3 sheets)

Iceland SPAR is often used as a polarizing prism because of its birefringent properties. If cut into a columnar shape in a certain way, it can be used as a microscope prism to detect the optical properties of minerals. The quality requirements must be: colorless and transparent, without internal bubbles or cracks, without twin crystals or distortions, and above 0.5 "(12.5mm) cubic. General calcite used in chemical, cement and other industrial raw materials. Calcite is used as a flux in the metallurgical industry and in the construction industry to produce cement and lime. Also used in plastics, paper, toothpaste. Used as filler in food. Calcite is added in the production of glass, the resulting glass will become translucent, especially suitable for making glass lampshades.

Calcite is found in limestone hills. It is widely found in tertiary and Quaternary limestone and metamorphic rock deposits. Calcite is the rock forming ore of the earth, accounting for more than 40% of the total amount of the crust, its species is not less than 200. Representative origin is China, Mexico, United Kingdom, France, United States, Germany. There are mines in every country in the world. Calcite is divided into dandan solution and small square solution, and bingzhou stone, China's calcite is mainly distributed in Guangxi, Jiangxi, Hunan area, Guangxi calcite in the domestic market because of high whitness, less acid insoluble matter is famous. Calcite is also found in the northeast part of North China, but often accompanied by dolomite, the whiteness is generally below 94, acid insoluble too high.