http://geologyscience.com/minerals/hematite/
Oxide mineral Britannica
http://webmineral.com/data/Goethite.shtml WebGoethite is a hydrous (water-bearing) iron oxide that forms as a direct precipitate in marine water and bogs, and as an alteration of other iron-bearing minerals. Along with hematite, … bounty filmweb
Hematite - Wikipedia
WebHematite Group Name: Originally named about 300-325 BCE by Theophrastus from the Greek, "αιματίτις λίθος" ("aematitis lithos") for "blood stone". It is possibly the first mineral ever named ending with a "-ite" suffix. Translated in 79 by Pliny the Elder to haematites, "bloodlike", in allusion to the vivid red colour of the powder. WebGoethite: Element of interest -Iron (Fe) Goethite: Mineral group? -Oxide Kaolinite: Al₂Si₂O₅ (OH)₄ -H=2 -Cleavage: Perfect -Color: White -Luster: Dull earthy Kaolinite: … Goethite is a mineral of the diaspore group, consisting of iron(III) oxide-hydroxide, specifically the "α" polymorph. It is found in soil and other low-temperature environments such as sediment. Goethite has been well known since ancient times for its use as a pigment (brown ochre). Evidence has … See more Goethite is an iron oxyhydroxide containing ferric iron. It is the main component of rust and bog iron ore. Goethite's hardness ranges from 5.0 to 5.5 on the Mohs Scale, and its specific gravity varies from 3.3 to 4.3. The mineral … See more Goethite is found all over the planet, usually in the form of concretions, stalactitic formations, oolites (a form consisting of tiny round grains … See more • Iridescent goethite, Filón Sur Mine, Tharsis, Huelva, Spain • Goethite from Minas Gerais, Brazil • A sharp, disc-shaped calcite has here been completely replaced by goethite, which preserved the original form perfectly See more • Spencer, Leonard James (1911). "Göthite" . Encyclopædia Britannica (11th ed.). See more Goethite often forms through the weathering of other iron-rich minerals, and thus is a common component of soils, concentrated in See more Its main modern use is as an iron ore, being referred to as brown iron ore. Goethite is an important component of ochre pigments, and has been heat-treated for use as a red pigment since Paleolithic times. Iron-rich lateritic soils that have developed over See more • Ochre • List of minerals • List of minerals named after people See more guglu new homes