tetrasulphur
Alternative spelling of tetrasulfur.

tungsten
A rare metallic chemical element (symbol W, from Latin wolframium) with an atomic number of 74.
A light bulb containing tungsten.
scheelite, calcium tungstate

tungstens
plural of tungsten

tungstenum
tungsten

verglas
silver frost

abernathyite
A rare hydrous uranium oxide mineral that forms yellow vitreous tabular crystals with perfect cleavage.

aeschynite
Any of several basic oxide minerals of mostly titanium and niobium with either cerium, neodymium or yttrium.

aeschynites
plural of aeschynite

afwillite
A calcium hydroxide nesosilicate mineral, occurring as glassy, colourless to white prismatic monoclinic crystals.

afwillites
plural of afwillite

akaganeite
A monoclinic iron(III) oxide-hydroxide/chloride mineral formed by the weathering of pyrrhotite.

akaganeites
plural of akaganeite

anatase
A blue or brown mineral, a form of titanium dioxide, used as a pigment.

anatases
plural of anatase

argutite
A germanium dioxide mineral.

arsenolite
A mineral form of arsenic trioxide.

arsenolites
plural of arsenolite

atacamite
A green copper(II) chloride hydroxide mineral, polymorphous with botallackite.

atacamites
plural of atacamite

baddeleyite
A rare zirconium oxide mineral occurring in a variety of monoclinic prismatic crystal forms.

baddeleyites
plural of baddeleyite

birnessite
A soft mineral, mostly containing manganese oxides, that occurs in manganese nodules.

birnessites
plural of birnessite

bismite
A monoclinic mineral, bismuth trioxide.

bixbyite
A rare manganese iron oxide mineral with a black metallic appearance.

blomstrandine
A basic oxide mineral containing a mixture of several rare earths

blomstrandines
plural of blomstrandine

boehmite
A mixed oxide and hydroxide of aluminium.

boehmites
plural of boehmite

bromellite
A white oxide mineral containing beryllium.

brookite
A dark brown mineral form of titanium dioxide, with the chemical formula TiO₂.

brookites
plural of brookite

brucite
A mineral form of magnesium hydroxide, Mg(OH)₂, often found in thin foliated plates, but may be fibrous (see nemalite), of a white or greenish color and vitreous to pearly luster.

brucites
plural of brucite

bunsenite
An isometric-hexoctahedral mineral containing nickel and oxygen, Nickel(II) oxide.

cadmia
Synonym of calamine, a pink form of zinc oxide.

cafetite
A rare titanium oxide mineral found in northern Russia.

cafetites
plural of cafetite

carmeltazite
A rare oxide mineral discovered in 2019, with the chemical formula ZrAl₂Ti₄O₁₁.

cassiterite
A generally black mineral, composed of tin oxide, SnO₂, which is an important ore of tin.

cassiterites
plural of cassiterite

cerianite
A rare oxide mineral, belonging to uraninite group.

chrysoberyl
A vitreous mineral, often pale green, a mixed oxide of aluminium and beryllium with the chemical formula BeAl₂O₄, used as a gemstone.

chrysoberyls
plural of chrysoberyl

chrysopal
Synonym of chrysoberyl.

clarkeite
A uranium oxide mineral of variable composition and uncertain structure, its colour varying from dark brown to orange.

claudetite
A mineral composed of arsenic trioxide, chemical formula As₂O₃.

coesite
A high-pressure polymorph of silica found in extreme conditions such as the impact craters of meteorites, with the chemical composition of silicon dioxide, SiO₂.

coesites
plural of coesite

corundum
An extremely hard mineral, a form of aluminum oxide with the chemical formula Al₂O₃, that occurs in the form of the gemstones sapphire and ruby; it is used as an abrasive.

corundums
plural of corundum

crednerite
A dark grey mineral that is a mixed oxide of copper and manganese.

crichtonite
A mixed oxide mineral containing several different lanthanides as well as titanium, iron and manganese.

crichtonites
plural of crichtonite

cummingtonite
A mineral, magnesium-iron silicate hydroxide, (Mg,Fe)₇Si₈O₂₂(OH)₂.

cummingtonites
plural of cummingtonite

cuprite
A mineral composed of cuprous oxide and a minor ore of copper.

cuprites
plural of cuprite

curundum
Misspelling of corundum.

daubreeite
A rare bismuth oxide–halide mineral of the matlockite group.

delafossite
A mixed oxide mineral of copper and iron.

delafossites
plural of delafossite

esmeraldite
Synonym of lepidocrocite.

esmeraldites
plural of esmeraldite

espinel
Obsolete form of spinel.

espinels
plural of espinel

euclase
A monoclinic beryllium aluminium hydroxide silicate mineral, a product of the decomposition of beryl in pegmatites.

euclases
plural of euclase

euxenite
A dark brown lustrous mineral that is a mixed oxide of cerium, erbium, titanium, uranium, yttrium and other more common metals, with the chemical formula (Y,Ca,Ce,U,Th)(Nb,Ta,Ti)₂O₆.

euxenites
plural of euxenite

fergusonite
A mineral composed of oxides of various rare earth elements.

feroxyhite
Alternative form of feroxyhyte.

feroxyhyte
A hexagonal oxide/hydroxide of iron that occurs in manganese-iron nodules on the Pacific Ocean floor, reverting to goethite on exposure to surface conditions.

feroxyhytes
plural of feroxyhyte

ferrihydrite
A hydrated iron oxide

ferrihydrites
plural of ferrihydrite

ferrobrucite
A variety of brucite that contains ferrous oxide.

ferromagnetite
A ferromagnetic form of magnetite; lodestone

ferromagnetites
plural of ferromagnetite

ferronemalite
A variety of nemalite that contains ferrous oxide.

ferropericlase
Any of a class of minerals, mixed oxides of magnesium and iron, that are abundant in the earth's lower mantle (second only to perovskite)

ferropericlases
plural of ferropericlase

ferropicotite
A variety of picotite that contains ferrous oxide.

fluorapophyllite
A particular apophyllite mineral with more fluorine than hydroxide compared to similar minerals.

fluorapophyllites
plural of fluorapophyllite

fluorohectorite
A clay mineral that is a mixed silicate / oxide / fluoride of lithium and magnesium.

fluorohectorites
plural of fluorohectorite

goethite
An iron oxyhydroxide that is the main constituent of rust and in mineral form is an ore.

goethites
plural of goethite

gothite
Alternative form of goethite.

gothites
plural of gothite

gummite
A yellow, amorphous mineral, a mixture of oxides and silicates of uranium, formed by weathering of pitchblende.

gummites
plural of gummite

haematite
Alternative spelling of hematite.

haematites
plural of haematite

hausmannite
A dark mineral composed of manganese tetroxide, sometimes used as an ore of manganese.

hausmannites
plural of hausmannite

hematite
An iron ore, mainly peroxide of iron, Fe₂O₃: iron(III) oxide.

hematites
plural of hematite

howlite
A calcium borosilicate hydroxide found in evaporite deposits.

hydrohematite
Synonym of lepidocrocite.

hydrohematites
plural of hydrohematite

iddingsite
A mixture of clay minerals and iron oxides formed by alteration of olivine

iddingsites
plural of iddingsite

ilmenite
A weakly magnetic dark gray mineral found in metamorphic and igneous rocks; it is a mixed oxide of iron and titanium, FeTiO₃

ilmenites
plural of ilmenite

ilmenorutile
A titanium-iron oxide mineral.

isopyre
A form of opal that has iron oxide impurities

isopyres
plural of isopyre

jacobsite
A manganese iron oxide mineral, a magnetite spinel.

jacobsites
plural of jacobsite

jadarite
A mineral, sodium lithium boron silicate hydroxide.

kassite
A rare mineral that is a basic oxide of calcium and titanium, with the chemical formula CaTi₂O₄(OH)₂.

kobeite
A hydrated oxide of a mixture of lanthanides and transition metals

kobeites
plural of kobeite

lepidicrocite
Misspelling of lepidocrocite.

lepidocrocite
A hydrated iron oxide related to hematite.

lepidocrocites
plural of lepidocrocite

lepodocrocite
Misspelling of lepidocrocite.

limonite
Any of several natural hydrous iron oxides; often a mixture of goethite and hematite with clays and manganese oxide.

limonites
plural of limonite