https://broadstoneminerals.com/species/cannizzarite/
Cannizzarite: The Lead Bismuth Sulphosalt of Vulcano
Cannizzarite is a lead bismuth sulphide, Pb8Bi10S23 on the IMA list, from fumaroles on Vulcano: silvery laths to 2 mm, hardness about 2, density 6.7, bendable.
the leadcannizzaritebismuthsulphosaltvulcano