What is "cipolin"

Cipolin \Cip"o*lin\, n. [It. cippollino, prop., a little onion, fr. cipolla onion (cf. E. cibol). So called because its veins consist, like onions, of different strata, one lying upon another.] (Min.) A whitish marble, from Rome, containiing pale greenish zones. It consists of calcium carbonate, with zones and cloudings of talc. [1913 Webster] ||

n. (context mineral English) A whitish marble from Rome, containiing pale greenish zones. It consists of calcium carbonate, with zones and cloudings of talc.