Gypsum, a key mineral in construction and manufacturing, is crucial for its ability to form a paste with water, making it indispensable in cement and plaster production. Contrary to common belief, in cement production, gypsum doesn't reduce but extends the setting time of cement. This extension is vital as it provides sufficient working time for the correct placement and adjustment of construction materials. However, the gypsum-cement relationship must be carefully managed. The appropriate amount of gypsum optimizes cement properties, but excess can cause 'delayed ettringite formation,' leading to the expansion, disruption, and compromised structural integrity of the set cement, resulting in cracking and reduced strength over time. Therefore, the controlled use of gypsum is essential for maintaining desired physical properties in construction materials, underscoring its significant role in cement processes.