Goethite is a mineral that has another name - “needle iron ore”. Already from the name it is clear that it is an iron-containing mineral. It is formed from a number of other iron-bearing minerals and is the end product of their weathering. Goethite is named after the great German poet Johann Wolfgang von Goethe, who was not only a poet, but also a naturalist and a collector of minerals. This mineral has a very wide distribution. Its forms are diverse: from crusts to crystals. In addition, it forms very spectacular pseudostalactites.
You can see goethite stone for sale and buy it in the Minerals of Russia online store.
|Category||oxide minerals hydroxide subgroup|
|Crystal class||Dipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m)
|Color||Yellowish to reddish to dark brown or black|
|Crystal habit||radial acicular, mammillary, botryoidal, stalactitic, massive, as encrustation, as pseudomorph; may be banded or iridescent|
|Fracture||Uneven to splintery|
|Mohs scale hardness||5 - 5.5|
|Luster||Adamantine to dull|
|Streak||Brown, brownish yellow to orange yellow|
|Specific gravity||3.3 - 4.3|
|Refractive index||Opaque to sub-translucent|
|Fusibility||Fusible at 5 - 5.5|
|Other characteristics||weakly magnetic|