A ferroan variety of Dolomite with up to 10% FeCO3 (Siderite component).
Originally reported from Brosso Mine, Cálea, Léssolo, Canavese District, Torino Province, Piedmont, Italy.
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
