It can be and is in the form of the mineral calcite.
Answer may be Stalactite and Stalagmite, found in caves of South America. (Inhabited by millions of Vampire Bats. )
A calcite stalactite.
Calcium carbonate is made of the elements calcium, carbon, and oxygen.
Limestone is primarily composed of calcium carbonate. However, calcium sulfate is not typically found in limestone; it is a separate mineral known as gypsum.
Calcium phosphate and calcium carbonate are found in bones .
A stalactite is made of mineral deposits, typically calcium carbonate, that accumulate as water drips from the ceiling of a cave. Over time, these deposits form a cone-shaped structure that hangs down from the cave ceiling.
Calcium carbonate is the compound made from the elements oxygen, calcium, and carbon. It is commonly found in rocks, shells, and pearls.
Calcium, Carbon, Oxygen
calcium carbonate
The main chemical found in egg shells is calcium carbonate. It provides strength and structure to the shell, helping to protect the developing embryo inside the egg.
Calcium carbonate is a chemical compound. It is a common substance found in rocks, shells of marine organisms, and eggshells. Calcium carbonate is widely used in industries such as construction, food, pharmaceuticals, and agriculture.
The acid is Carbonic Acid, formed by Carbon Dioxide from the atmosphere dissolving into rain-water, and though very weak capable of dissolving limestone whose main constituent is calcium Carbonate. The stalactites are of calcite, crystallised calcium carbonate precipitated from that solution.