Alum-(K) - Montioni, Italy - 12 x 8 cm
Mineral: Alum-(K)
Locality: Montioni, Suvereto, Livorno Province, Tuscany, Italy
Dimensions: 12 x 8 cm

Description: A very rare specimen (the unique known) of well crystallized Alum-K from a historical mine belonged to Elisa Bonaparte, princess of Piombino and sister of Napoleon, self-collected in 1972.