The calcium in eggs is concentrated in the yolk. The yolk is the yellow or orange part of the egg, and it contains a variety of essential nutrients, including calcium. <nis:link nis:type=tag nis:id=WorldEggDay nis:value=WorldEggDay nis:enabled=true nis:link/> <nis:link nis:type=tag nis:id=Eggcellent nis:value=Eggcellent nis:enabled=true nis:link/> <nis:link nis:type=tag nis:id=animalhusbandry nis:value=animalhusbandry nis:enabled=true nis:link/>