Mis forMarble (rock)
Marble is limestone that has been changed from a sedimentary rock to a crystalline one through high pressures under the surface of the Earth. Marble is much stronger than limestone, and can be polished to a shiny finish. It is frequently used for making statues from, and for making decorative features in buildings like floors and pillars from.
Moonstone is a mineral made from potassium aluminium silicate. It is formed in thin layers, which gives it an interesting light scattering effect called adularescence. The highest quality moonstones come from Sri Lanka.
Pearls are made inside the shells of mollusks like clams and oysters. They are usually round, and have a soft, translucent glow to them. Pearls have been made into jewellery for thousands of years.