Goethite
Goethite was named in honor of German genius Johann written by Wolfgang von Goethe, who also was a passionate collector of minerals. Goethite is formed by the oxidation of other iron minerals. It also occurs in sediments, less often in hydrothermal veins and pegmatites. It is black-brown to red-brown in color. It usually occurs as coatings, further in spherical, kidney-shaped or stalactite-like formations, often with a radiate-needle structure. They often form pseudomorphoses over other minerals, such as pyrite, siderite or hematite. More info
Goethite was named in honor of German genius Johann written by Wolfgang von Goethe, who also was a passionate collector of minerals. Goethite is formed by the oxidation of other iron minerals. It also occurs in sediments, less often in hydrothermal veins and pegmatites. It is black-brown to red-brown in color. It usually occurs as coatings, further in spherical, kidney-shaped or stalactite-like formations, often with a radiate-needle structure. They often form pseudomorphoses over other minerals, such as pyrite, siderite or hematite.