Geographic Minerals

Kesterite: Properties and Occurrences

Kesterite: Properties and Occurrences

Kesterite is a sulfide mineral with a formula Cu2(Zn, Fe)SnS4. In its lattice structure, zinc and iron atoms share the same lattice sites. It is the Zn-rich variety whereas the Zn-poor form is called ferrokesterite or stannite. Owing to their similarity, kesterite is sometimes called isostannite......

Read More »

Kernite: Properties and Occurrences

Kernite: Properties and Occurrences

Kernite, also known as rasorite is a hydrated sodium borate hydroxide mineral with formula Na2B4O6(OH)2·3H2O. It is a colorless to white mineral crystallizing in the monoclinic crystal system typically occurring as prismatic to acicular crystals or granular masses. Kernite could be considered a .....

Read More »

Kermesite: Properties and Occurrences

Kermesite: Properties and Occurrences

Kermesite or antimony oxysulfide is also known as red antimony (Sb2S2O). It is an unusual sulfide mineral. The mineral’s color ranges from cherry red to a dark red to a black. It is the result of partial oxidation between stibnite (Sb2S3) and other antimony oxides such as valentinite (Sb2O3] or.....

Read More »

Keilite: Properties and Occurrences

Keilite: Properties and Occurrences

Keilite is an iron-magnesium sulfide mineral [chemical formula- (Fe, Mg)S)] that is found in enstatite chondrites. It is an isometric-hexoctahedral gray mineral containing calcium, chromium, iron, magnesium, manganese, sulfur, and zinc It is the iron-dominant analog of niningerite. It is named af.....

Read More »

Kegelite: Properties and Occurrences

Kegelite: Properties and Occurrences

Kegelite is a complex silicate mineral with formula Pb8Al4Si8O20(SO4)2(CO3)4(OH)8. It is a monoclinic mineral containing aluminum, carbon, hydrogen, lead, oxygen, silicon, and sulfur. It was first described in 1975 for an occurrence in the Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia and named f.....

Read More »

Kassite: Properties and Occurrences

Kassite: Properties and Occurrences

Kassite is a rare mineral whose chemical formula is CaTi2O4(OH)2. It was first described in 1965 in the Afrikanda pyroxenite massif, a formation on Russia’s Kola Peninsula and was named for Nikolai Grigorievich Kassin (1885–1949), a prominent Russian geologist. It occurs as miarolitic cav.....

Read More »

Karlite: Properties and Occurrences

Karlite: Properties and Occurrences

Karlite is a silky white to light green orthorhombic borate mineral, not to be confused with tremolite-actinolite. It has a general formula of Mg7(BO3)3(OH)4Cl. It is an orthorhombic-disphenoidal mineral containing aluminum, boron, chlorine, hydrogen, magnesium, and oxygen. This mineral was origi.....

Read More »

Kaolinite: Properties and Occurrences

Kaolinite: Properties and Occurrences

Kaolinite is a clay mineral, part of the group of industrial minerals, with the chemical composition Al2Si2O5(OH)4. It is a layered silicate clay mineral which forms from the chemical weathering of feldspar or other aluminum silicate minerals. It is a layered silicate mineral, with one tetrahedra.....

Read More »

Kanoite: Properties and Occurrences

Kanoite: Properties and Occurrences

Kanoite is a light pinkish brown silicate mineral that is found in metamorphic rocks. It is a silicate mineral that is found in metamorphic rocks. It is an inosilicate and has a formula of (Mg, Mn2+)2Si2O6. It is a member of the pyroxene group and clinopyroxene subgroup. It was named after Dr. Hi.....

Read More »

Kankite: Properties and Occurrences

Kankite: Properties and Occurrences

Kankite is a mineral with the chemical formula Fe3+AsO4·3.5(H2O). It is a monoclinic yellow-green mineral containing arsenic, hydrogen, iron, and oxygen. It contains the elements arsenic, iron, hydrogen and oxygen. It is yellowish-green on fresh exposure, with a paler greenish yellow on exposure.....

Read More »

Kampfite: Properties and Occurrences

Kampfite: Properties and Occurrences

Kampfite is a rare barium silicate–carbonate–halide mineral with formula: Ba12(Si11Al5)O31(CO3)8Cl5. Discovered in 1964 and described in 2001, it is named after Anthony R. Kampf. The mineral is known only from Fresno County, California. It occurs there as a rock-forming mineral in a quartz-sa.....

Read More »

Kamiokite: Properties and Occurrences

Kamiokite: Properties and Occurrences

Kamiokite is an iron-molybdenum oxide mineral with the chemical formula Fe2Mo3O8. It is a hexagonal-dihexagonal pyramidal iron black mineral containing iron, molybdenum, and oxygen. The name kamiokite is derived from the locality, the Kamioka mine in Gifu Prefecture, Japan, where this mineral was.....

Read More »