kladnoite
A monoclinic-prismatic mineral containing carbon, hydrogen, nitrogen, and oxygen.

klaprothite
A form of lazulite

klaprotholite
Synonym of klaprothite.

klaprotholites
plural of klaprotholite

klebelsbergite
An orthorhombic-pyramidal mineral containing antimony, hydrogen, oxygen, and sulfur.

kleemanite
A monoclinic mineral containing aluminum, hydrogen, oxygen, phosphorus, and zinc.

kleinite
A hexagonal-dihexagonal dipyramidal mineral containing chlorine, hydrogen, mercury, nitrogen, oxygen, and sulfur.

klementite
A variety of thuringite

kliachite
Synonym of bauxite.

klippe
A geological feature of thrust fault terrains.

kljakite
Synonym of bauxite.

klockmannite
A copper-selenium mineral (CuSe)

klyuchevskite
A monoclinic mineral containing aluminum, copper, iron, oxygen, potassium, and sulfur.

knasibfite
An orthorhombic, vitreous mineral found in Sicily.

knopite
A variety of perofskite containing cerium in place of calcium.

knopites
plural of knopite

knorringite
A green or blue mineral of the garnet group, forming a series with pyrope.

knorringites
plural of knorringite

knotenschiefer
A variety of spotted slate characterized by conspicuous subspherical or polyhedral clots that are often individual minerals.

koashvite
An orthorhombic-dipyramidal mineral containing calcium, hydrogen, iron, manganese, oxygen, silicon, sodium, and titanium.

kochite
A triclinic-pinacoidal mineral containing aluminum, calcium, cerium, fluorine, hafnium, iron, lanthanum, manganese, niobium, oxygen, silicon, sodium, strontium, titanium, vanadium, yttrium, and zirconium.

kochkarite
A trigonal-hexagonal scalenohedral silver gray mineral containing bismuth, lead, and tellurium.

koechlinite
An orthorhombic-dipyramidal mineral containing bismuth, molybdenum, and oxygen.

koenenite
A trigonal-hexagonal scalenohedral mineral containing aluminum, chlorine, hydrogen, magnesium, oxygen, and sodium.

koktaite
A monoclinic-prismatic mineral containing calcium, hydrogen, nitrogen, oxygen, and sulfur.

kolarite
An orthorhombic gray mineral containing chlorine, lead, and tellurium.

kolfanite
A monoclinic-prismatic mineral containing arsenic, calcium, hydrogen, iron, and oxygen.

kolicite
An orthorhombic-dipyramidal yellow orange mineral containing arsenic, hydrogen, manganese, oxygen, silicon, and zinc.

kolovratite
A monoclinic mineral containing hydrogen, nickel, oxygen, vanadium, and zinc.

kolwezite
A triclinic mineral containing carbon, cobalt, copper, hydrogen, and oxygen.

kolymite
An isometric-hextetrahedral mineral containing copper and mercury.

komarovite
An orthorhombic mineral containing calcium, fluorine, hydrogen, manganese, niobium, oxygen, silicon, sodium, and titanium.

kombatite
A monoclinic-prismatic light yellow mineral containing chlorine, lead, oxygen, and vanadium.

komkovite
A trigonal-trapezohedral brown mineral containing barium, hydrogen, oxygen, silicon, and zirconium.

konderite
A hexagonal-dipyramidal steel gray mineral containing copper, iridium, lead, platinum, rhodium, and sulfur.

kongsbergite
A variety of silver containing about 5% mercury

koninckite
A tetragonal mineral containing hydrogen, iron, oxygen, and phosphorus.

konite
Alternative form of conite.

konyaite
A monoclinic-prismatic mineral containing hydrogen, magnesium, oxygen, sodium, and sulfur.

koppite
A columbate of alkali metal and alkaline earth metals.

koppites
plural of koppite

koragoite
A monoclinic-sphenoidal light gray mineral containing iron, manganese, niobium, oxygen, tantalum, titanium, and tungsten.

koritnigite
A triclinic-pinacoidal colorless mineral containing arsenic, hydrogen, oxygen, and zinc.

kornelite
A monoclinic-prismatic mineral containing hydrogen, iron, oxygen, and sulfur.

kornite
A monoclinic-prismatic mineral containing aluminum, calcium, hydrogen, iron, oxygen, silicon, and sodium.

korobitsynite
An orthorhombic-dipyramidal colorless mineral containing hydrogen, niobium, oxygen, silicon, sodium, and titanium.

korshunovskite
A triclinic colorless mineral containing chlorine, hydrogen, magnesium, and oxygen.

korzhinskite
A monoclinic-prismatic colorless mineral containing boron, calcium, hydrogen, and oxygen.

kosmochlor
A monoclinic-prismatic emerald green mineral containing chromium, oxygen, silicon, and sodium.

kostovite
An orthorhombic-pyramidal gray white mineral containing copper, gold, and tellurium.

kostylevite
A monoclinic-prismatic mineral containing hydrogen, oxygen, potassium, silicon, and zirconium.

koswite
A coarse-grained peridotite

kotoite
A mineral form of magnesium borate that is isostructural with jimboite

kotoites
plural of kotoite

kotschubeite
A chromium chlorite mineral.

kotulskite
A hexagonal-dihexagonal dipyramidal mineral containing bismuth, palladium, and tellurium.

koutekite
A hexagonal-dihexagonal dipyramidal gray blue mineral containing arsenic and copper.

kovdorskite
A monoclinic-prismatic mineral containing carbon, hydrogen, magnesium, oxygen, and phosphorus.

kozulite
A monoclinic-prismatic mineral containing aluminum, hydrogen, iron, manganese, oxygen, silicon, and sodium.

kraisslite
A hexagonal-trapezohedral mineral containing arsenic, hydrogen, iron, magnesium, manganese, oxygen, silicon, and zinc.

krantzite
A variety of amber.

krasnovite
An orthorhombic-dipyramidal pale blue mineral containing aluminum, barium, carbon, hydrogen, magnesium, oxygen, and phosphorus.

kratochvilite
A rare organic mineral, an orthorhombic hydrocarbon formed by combustion of coal or pyritic black shale deposits.

kratochvilites
plural of kratochvilite

kraurite
Synonym of dufrenite.

krausite
A monoclinic-prismatic mineral containing hydrogen, iron, oxygen, potassium, and sulfur.

krauskopfite
A monoclinic-prismatic mineral containing barium, hydrogen, oxygen, and silicon.

krautite
A monoclinic-sphenoidal light pink mineral containing arsenic, hydrogen, manganese, and oxygen.

kreittonite
A black variety of automolite; a zinc spinel or zinc-iron gahnite mineral from Bavaria.

kremersite
An orthorhombic-dipyramidal mineral containing chlorine, hydrogen, iron, nitrogen, oxygen, and potassium.

krennerite
An orthorhombic-pyramidal creamy white mineral containing gold and tellurium.

krettnichite
A monoclinic-prismatic reddish brown mineral containing arsenic, cobalt, hydrogen, iron, lead, manganese, oxygen, strontium, and vanadium.

kribergite
A triclinic white mineral containing aluminum, hydrogen, oxygen, phosphorus, and sulfur.

krinovite
A triclinic-pinacoidal mineral containing chromium, magnesium, oxygen, silicon, and sodium.

kristiansenite
A triclinic-pedial mineral containing aluminum, calcium, hydrogen, iron, oxygen, scandium, silicon, sodium, tin, and zirconium.

krisuvigite
brochantite

krokidolite
Alternative form of crocidolite.

krotite
A natural mineral composed of calcium, aluminium and oxygen, with the molecular formula CaAl₂O₄.

krupkaite
An orthorhombic-pyramidal grayish white mineral containing bismuth, copper, lead, and sulfur.

krutaite
An isometric-diploidal gray mineral containing copper and selenium.

krutovite
A cubic nickel diarsenide mineral.

kryolite
Alternative form of cryolite.

kryolites
plural of kryolite

kryzhanovskite
An orthorhombic-dipyramidal mineral containing hydrogen, iron, manganese, oxygen, and phosphorus.

ktenasite
A monoclinic-prismatic mineral containing copper, hydrogen, oxygen, sulfur, and zinc.

kudriavite
A monoclinic-prismatic dark reddish gray mineral containing bismuth, cadmium, indium, iron, lead, manganese, selenium, and sulfur.

kukersite
A light-brown marine type oil shale of Ordovician age.

kukharenkoite
A radioactive mineral containing barium, cerium, and fluorine.

kukisvumite
An orthorhombic-dipyramidal mineral containing hydrogen, oxygen, silicon, sodium, titanium, and zinc.

kulanite
A monoclinic-prismatic mineral containing aluminum, barium, hydrogen, iron, magnesium, manganese, oxygen, and phosphorus.