Mt. Cavalluccio,  Campagnano di Roma,  Sacrofano Caldera,  Rome Province, Latium,  Italy - Rare specimen of Peprossiite-Ce on matrix. According to mindat, this mineral species is the first  anhydrous rare-earth-element borate and is found in only 4 localities, all located within Latium, Italy. Thumbnail of 1.2x1x0.9 cm