Q: Is Calcium Carbonate vegan?

A: Possibly. It is a common substance found as rock in all parts of the world and is the main component of seashells and the shell of snails. It is usually the principal cause of hard water. Calcium carbonate is found naturally as the following minerals and rocks: Aragonite, Calcite, Vaterite or (µ-CaCO3), Chalk, Limestone, Marble, Travertine, etc. Depending on the source, it may be vegan.