Geographic Minerals

Cordierite (mineralogy) or iolite (gemology) is a magnesium iron aluminum cyclosilicate. It is normally used for applications that required high temperatures and are subject to…

Ixiolite is an accessory oxide mineral found in granitic pegmatites. It is an oxide with the general chemical formula (Ta, Nb, Sn, Mn, Fe)4O8 or…

Iridium is a chemical element with symbol Ir and atomic number 77. A very hard, brittle, silvery-white transition metal of the platinum group, iridium is…

Iranite (Persian: ایرانیت) is a triclinic lead copper chromate silicate mineral with formula Pb10Cu(CrO4)6 (SiO4)2 (F, OH)2. It was first described from an occurrence in…

Iodyrite or iodargyrite is a natural mineral form of silver iodide. It is a yellowish or greenish hexagonal mineral AgI consisting of native silver iodide…

Inyoite, named after Inyo County, California, where it was discovered in 1914, is a colorless monoclinic mineral. It turns white on dehydration. It is a…

Indium is a chemical element with symbol In and atomic number 49. It is a soft, ductile, manleable, lustrous metallic metal. It is a post-transition…

Indite is an extremely rare indium-iron sulfide mineral, found in Siberia. Its chemical formula is FeIn2S4. Indite is that mineral is (geology) any naturally occurring inorganic material that…

Imogolite is an aluminum silicate clay mineral with formula: Al2SiO3(OH)4. It is an aluminum silicate clay mineral found in soils formed from volcanic ash. Its…

Ilvaite is a sorosilicate of iron and calcium with the formula: CaFe22+Fe3+Si2O7O(OH). Both manganese and magnesium substitute in the structure. It is a mineral consisting…

Ikaite is the mineral name for the hexahydrate of calcium carbonate, CaCO3·6H2O. It is a saline evaporite, consisting of hydrated calcium carbonate, found in cold…

An illite is a group of closely related non-expanding clay minerals. It is a clay mineral of a group resembling micas, with a lattice structure…