bassanite
noun
bas·sa·nite
bə-ˈsä-ˌnīt
plural -s
: a mineral CaSO4‧¹/₂H2O consisting of calcium sulfate found in white opaque crystals in blocks ejected from Vesuvius in 1906 (specific gravity 2.69–2.76) compare plaster of paris
Word History
Etymology
Italian, from Francesco Bassani, 20th century Italian geologist + Italian -ite