Gypsum powder is usually white and colorless. Colorless transparent crystals are called translucent gypsum. Sometimes they become gray, light yellow, light brown and other colors due to impurities. Streaks white. transparent. Glass luster, cleavage surface pearl luster, fibrous aggregate silk luster. The cleavage is extremely complete and moderate, and the cleavage pieces are split into rhombuses with plane angles of 66 and 114. Fragile. Hardness 1.5~2. There are slight variations in different directions. Relative density 2.3. Gypsum powder is one of the five major gel materials and occupies an important position in the national economy. It is widely used in many application fields such as construction, building materials, industrial molds and art models, chemical industry and agriculture, food processing, medicine and beauty, etc. It is a Important industrial raw materials.

Gypsum is added to make tofu, which is different from gypsum powder. The main component of gypsum in tofu is calcium sulfate. If you use gypsum to make a brine, first roast the gypsum until it is just past the core, then grind it into powder and add water to make a gypsum slurry. Pour it into the soy milk just scooped out of the pot and stir it gently with a spoon. After a while, the soy milk will condense into tofu curd. There is a certain amount of gypsum added to make tofu. The gypsum added to tofu is beneficial to the human body. Gypsum has the functions of clearing away heat, purging fire, eliminating restlessness, and quenching thirst.

Gypsum is a monoclinic mineral, a hydrate whose main chemical component is calcium sulfate (CaSO4). Gypsum is a widely used industrial and construction material. It can be used as cement retarder, gypsum building products, model making, medical food additives, sulfuric acid production, paper filler, paint filler, etc. The microporous structure and thermal dehydration properties of gypsum and its products make it have excellent sound insulation, heat insulation and fire protection properties.