Oyster Shells

Oyster shells are the hard, calcium carbonate exteriors of oysters, providing protection and structural support. They form as oysters grow, layering over time through biological processes. These shells are made primarily of calcium carbonate, which also gives them a white or sometimes iridescent appearance. Oysters use their shells to defend against predators and environmental threats, and the shells’ shape and structure can vary depending on the oyster species and habitat. Besides their biological role, oyster shells are valued for recycling into products like lime, building materials, and environmental uses such as reef restoration.