John W. Gruner
John Walter Gruner (12 July 1890, Neurode, now Nowa Ruda – 1981) was a German-born American mineralogist, crystallographer, and geologist. He scientifically described and named two minerals: minnesotaite (1944) and groutite (1945).
John Walter Gruner (12 July 1890, Neurode, now Nowa Ruda – 1981) was a German-born American mineralogist, crystallographer, and geologist. He scientifically described and named two minerals: minnesotaite (1944) and groutite (1945).