Gypsumi
Gypsumi is a mineral species in the sulfate group, defined by a hydrated calcium sulfate composition with natural variation in water content. The name Gypsumi reflects its relationship to gypsum while denoting a distinct mineral identity. As of recent mineral catalogs, Gypsumi is a proposed name awaiting formal approval by the International Mineralogical Association (IMA).
Chemically, Gypsumi is based on calcium sulfate with variable hydration, commonly represented as CaSO4·(1.5–2.5)H2O to reflect
Gypsumi forms in evaporitic and diagenetic environments where sulfate-rich waters precipitate minerals from solution. It is
Economically, Gypsumi has limited direct use but may be processed for use in plaster and ornamental plasters
Etymology emphasizes its link to gypsum; the suffix -mi marks its proposed status as a separate mineral
Safety: like other sulfate minerals, Gypsumi dust can irritate the eyes, skin, and lungs; standard mineral-handling