Home > Laskowski Ⅵ – July 29 > MS1921 Manganoneptunite

Manganoneptunite - Sold

Manganoneptunite is a potassium sodium manganese lithium silicate, related to neptunite. Fersman (1923) named mangan-neptunite for its manganese content and relationship to neptunite. The root mineral name neptunite honors Neptune, sea-god of Roman mythology (Flink, 1893). Ultimately, the International Mineralogical Association changed the mineral name to manganoneptunite (Burke, 2008).

Manganoneptunite forms red-brown crystals to 9 mm on a matrix of feldspar and aegirine. From the collection of E.R. Laskowski (1949-2020), a mining engineer who retired to Tucson, Arizona.