What is 95% of an eggshell made up of?
                                
                                
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                                    4 min read                                
                            
                                Comprising an astonishing 95% of its dry weight, the primary component of an eggshell is a single, hard mineral, scientifically known as calcium carbonate. This crystalline material is meticulously structured to provide a durable protective barrier for the developing embryo.