Calcite From Taffs Well Quarry, South Wales, UK- Collectors PieceCalcite From Taffs Well Quarry, South Wales, UK Collectors Piece Weight 75g Size 5. 3cm by 3. 5cm Thickness 3. 3cm Calcite is a rock forming mineral with a chemical formula of CaCO3. It is widespread and found throughout the world in sedimentary, metamorphic, and igneous rocks. Calcite is a powerful cleanser and is good to have around you because it can clear stagnant energies from any environment. It also removes sick or stagnant energies from within