Gardener with basket of egg shells spreading crushed shells around tomato plant - VH-studio/Shutterstock A quality eggshell contains about 2.2 grams of calcium carbonate, the compound that gives them ...

Hens' eggs are the type of egg most frequently used in cooking. Duck eggs, gull eggs and quail eggs are less frequently used and are generally eaten on their own, rather than in baking. Quail eggs are ...