The chemical formula of celestite is SrSO4, which is the most important strontium-containing mineral in nature. Plate-like or columnar and flaky crystals, rhombic biconical crystals, plate-like crystals. The colors of celestite are blue, green, yellow-green, orange or colorless, light blue-gray. Pure celestite crystal is light blue or sky blue, so it is called celestite. Sometimes it is colorless and transparent, and it is black when mixed with impurities.

I. Basic information

Category: sulfate minerals;

Minerals: timely;

Chemical formula: srso 4；;

Color: blue, green, yellow-green, orange, light blue, gray, etc.

Crystal system: orthogonal crystal system;

Hardness: 3.0-3.5;

Distribution: dolomite, limestone, marl, etc.

Second, the main producing areas

From a global perspective, celestite minerals are widely distributed; But the total reserves of celestite are not very rich, usually only 200 million tons. Among them, China's celestite resources account for 2/3 of the world's reserves. The famous producing areas are Gangou in Hechuan, Sichuan and Aijing Mountain in Shui Piao, Jiangsu. Gem-grade lapis lazuli is mainly produced in Namibia and Madagascar, and some are produced in Ontario, Canada and Lower Saxony, Germany.