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eggshell calcium carbonate in food us-mining equiments supplier

Apr 09, 2020 Its main ingredient, however, is calcium carbonate – a form of limestone. Calcium carbonate (CaCO3) is the chemical that lets us draw on the sidewalk with a piece of chalk. Do you know what else contains calcium carbonate? Eggshells! This makes them a great alternative to store-bought chalk. Share your colorful creations with us by using the ...