Calcite is a carbonate mineral (most stable form of calcium carbonate with CaCO3 chemical formula) and it is named after Latin word calx meaning lime (calcite, also called limespar or calcspar). Common worldwide, calcite is the principal component of limestones and marbels, and of most stalactites and stalagmites. It comes in a wide range of colors, including yellow, brown, orange, Pink, and colorless. Calcite has little intrinsic value since it is not rare. However, calcite is one of the most difficult of all minerals to be cut because of perfect cleavage in 3 directions.