Calcium ions (Ca²+) are positively charged particles formed when calcium atoms lose two electrons. They play a crucial role in various biological processes, including muscle contraction, nerve transmission, and blood clotting. Calcium ions are essential for maintaining healthy bones and teeth, as they contribute to the structure and strength of bone tissue. In addition to their biological importance, calcium ions are involved in many industrial applications. They are used in the production of cement, glass, and various chemical processes. Calcium ions also help regulate pH levels in aquatic environments, making them vital for the health of ecosystems.