What is a cipolin in geology ?

Cipolin : definition

A cipolin is a metamorphic limestone with thin serpentine threads favoring a flow of peels (from the Italian cipolla, onion, evoking the similar flow of the rock and the bulb). This initially restrictive meaning was broadened to designate calcareous metamorphic rocks, homogeneous or veined, made up of calcite frequently accompanied by metamorphic minerals (grossular, diopside, chondrodite, etc...). These "crystalline limestones" generally provide beautiful marbles.