Minerals, Ores, and Gemstoneslink.springer.com › content › pdf
erals and metallic ores of intrinsic economic interest in such form, quality, and quantity that ... Sedimentary rocks such as limestone, dolomite, clays, sand, gravel, diatomite ... A gemstone is a semiprecious or precious natural mineral with exceptional ... crystallographic surfaces) owing to the weakness in their atomic structure ...