Jervisite , Cascandite Locality: Seula mine (ex Montecatini quarry), Mount Camoscio, Oltrefiume, Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy Original description: jervisite - some white tufts on cascandite - area 1 mm. Self collected november 2007. Sergio varvello photo and collection — Photo: Sergio Varvello · Public domain
Jervisite
Jervisite is an IMA-recognized mineral species in the silicate class, with the chemical formula NaSc³⁺Si₂O₆.
It crystallizes in the monoclinic crystal system (space group C2/c). It is a member of the Pyroxene structural group.
Key properties: specific gravity 3.31; Vitreous luster.
IMA symbol Je, IMA status: approved, named in 1980.
Found in miarolitic cavities in granite.
It is found associated with Cascandite, quartz, orthoclase, albite.
The mineral was named to honor William P. Jervis, Curator of the Museo Industriale Italiano di Torino, Torino, Italy.