karbonaatsete kivimite peamine koostismineraal, eines der am häufigsten vorkommenden Minerale, gehört zur Gruppe der Karbonate, depósito mineral de carbonato cálcico cristalino, a mineral consisting of calcium carbonate crystallized in hexagonal form, clearing readily into rhombohedrons, and including besides common limestone chalk, marble dogtooth spar, iceland spar, stalactites, and stalagmites