Gypsum

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Gypsum

Gypsum is a soft sulfate mineral composed of calcium sulfate dehydrate, with the chemical formula CaSO. 4• 2H2O. It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, blackboard/sidewalk chalk, and drywall.

The Khewra mine is one of the largest gypsum mines in Pakistan. The mine is located in Punjab. The mine has reserves amounting to 25 million tons of gypsum.

Gypsum is a neutral salt with a pH of about 6.7 and a salt index of 8. It typically contains 16–18% sulfur and 20–22% calcium.

Gypsum has many properties…​

Fertilizer

Provides nutrients to plants by supplying calcium and sulfur

Soil erosion prevention

Helps prevent soil erosion

Soil composition improvement

Improves soil composition

Water and air movement

Helps water and air move through the soil

Root growth

Facilitates root growth

Micronutrient balance

Balances micronutrients like iron and zinc

Acid soil improvement

Improves acid soils

Aluminum toxicity treatment

Helps treat aluminum toxicity

Other Uses

Drywalls, Tofu, Impression plaster, Dental plaster, Dental stone, Die stone, Cement, Tiles, and Blocks.