chemical formula: CaCO3
( fine powder )
Calcium carbonate is widely used medicinally as a stomach antacid and an ingredient in toothpaste. It can be heated to form 'Quicklime' which is then added to water. This forms another material known as 'Slaked Lime' which is a base material used throughout the chemical industry. In pyrotechnics, it's used to color flames orange. Calcium Carbonate makes a rock-hard adhesive when mixed with an equal amount of Zinc Oxide, and a little Sodium Silicate to form a paste. This rapid setting adhesive is typically used to plug firework tubes.