A biomineral is a naturally occurring mineral that is produced by living organisms. These minerals are formed through biological processes and often play essential roles in the organism's structure and function. Common examples of biominerals include calcium carbonate in seashells and apatite in bones and teeth. Biominerals can provide insights into the evolutionary adaptations of organisms and their environments. They are studied in various fields, including geology, paleontology, and materials science, to understand how life interacts with minerals and to explore potential applications in technology and medicine.