Admontite

Admontite is a hydrated magnesium borate mineral with formula MgB6O10·7H2O.

Occurrence - In a gypsum deposit. Associations: gypsum, anhydrite, hexahydrite, löweite, eugsterite, pyrite, quartz.

It is named after Admont, Austria. Its Mohs scale rating is 2 to 3.