Most bird eggshells are primarily composed of calcium carbonate. Calcium carbonate is a white, powdery substance that makes up the majority of the shell. This compound provides strength and protection to the developing embryo inside the egg.
Most bird eggshells are composed of calcium carbonate, a compound of calcium, carbon, and oxygen. This compound is strong and durable enough to protect the developing embryo, yet porous enough to allow air and moisture to pass through.
