Luminous stone is fluorite, also called fluorite.

A common mineral in nature, which can be produced together with other minerals, is produced in many parts of the world, and there are five effective varieties. Equiaxed crystal system, the main component is calcium fluoride (CaF? ) 。

Crystals are octahedrons and cubes. The crystal is glassy, colorful and fragile, with Mohs hardness of 4 and melting point of 1360℃, which has the property of perfect cleavage. Some samples can emit light under the conditions of friction, heating and ultraviolet irradiation.

This mineral comes from volcanic magma. During the cooling process of magma, the gas-water solution separated by magma contains fluorine. In the process of solution rising along the fracture, fluoride ions in gas-water solution combine with calcium ions in surrounding rock to form calcium fluoride, and fluorite is formed after cooling and crystallization.

Existing in granite, pegmatite, syenite and other rocks.

Because of its brittleness and softness, it is not often used as a gem. In industry, fluorite is the main source of fluorine, and fluorine and its compounds can be extracted and prepared.

Fluorite specimens are bright in color and beautiful in crystal form, which can be used for collection, decoration and carving handicrafts.

Extended data:

Formation process of fluorite;

Fluorite comes from the remnants of volcanic magma. During the cooling process of magma, the gas-water solution separated by magma contains many substances, mainly fluorine.

In the process of the solution rising along the fracture, the temperature and pressure decrease, and fluoride ions in the gas-water solution combine with calcium ions in the surrounding rock to form calcium fluoride, and fluorite is obtained after cooling and crystallization.

Baidu Encyclopedia _ fluorite