lithiophorite
A basic oxide of lithium, manganese and aluminium found in hydrothermal ore deposits and sedimentary manganese deposits, with the chemical formula (Al,Li)Mn⁴⁺O₂(OH)₂.

loparite
A granular, brittle oxide mineral of the perovskite class.

loparites
plural of loparite

magnesia
magnesium oxide

magnesias
plural of magnesia

magnetite
A magnetic mineral, Fe₃O₄, one of the primary ores of iron.
Any instance of iron(II,III) oxide, regardless of whether it is a geologic mineral or a chemical result or product.

magnetites
plural of magnetite

manganomelane
Any of a group of colloidal hydrated manganese oxide minerals.

manganomelanes
plural of manganomelane

marcylite
atacamite

marokite
A dark brown mineral, a mixed oxide of calcium and manganese, found in hydrothermal deposits

masuyite
A uranium/lead oxide mineral.

melanochalcite
Synonym of tenorite.

menaccanite
A black or steel-grey mineral consisting chiefly of the oxides of iron and titanium.

menaccanites
plural of menaccanite

murataite
An isometric-hextetrahedral black mineral that is a basic oxide and fluoride of yttrium, sodium, zinc, iron, titanium and niobium

nsutite
A dull manganese oxide mineral.

paratellurite
A synthetic, colourless tetragonal form of tellurium dioxide.

pectolite
a gray-white mineral inosilicate hydroxide of calcium and sodium that crystallizes in the triclinic system, with the chemical formula NaCa₂Si₃O₈(OH).

pectolites
plural of pectolite

periclase
A cubic crystalline form of magnesium oxide (MgO).

periclases
plural of periclase

pitchblende
Naturally-occurring uranium oxide, a variety of the mineral uraninite.

pitchblendes
plural of pitchblende

polianite
manganese dioxide, occurring in hard tetragonal crystals

polianites
plural of polianite

polycrase
A black or brown amorphous metallic complex uranium yttrium oxide mineral, found in granitic pegmatites.

polycrases
plural of polycrase

polymignite
Alternative form of polymignyte.

polymignites
plural of polymignite

polymignyte
A mineral consisting of columbate (a compound containing the element niobium) and oxides of the cerium group of elements with iron and calcium.

polymignytes
plural of polymignyte

portlandite
A rare oxide mineral, the naturally-occurring form of calcium hydroxide.

portlandites
plural of portlandite

pyrolusite
A dark coloured mineral, consisting of manganese dioxide (MnO₂), that is an important ore of manganese.

pyrolusites
plural of pyrolusite

quartz
The most abundant mineral on the earth's surface, of chemical composition silicon dioxide, SiO₂. It occurs in a variety of forms, both crystalline and amorphous. Found in every environment.
Crystal meth: methamphetamine hydrochloride.

quartzarenite
Alternative form of quartz arenite.

quartzarenites
plural of quartzarenite

quartzes
plural of quartz

quartzmonzonite
Alternative form of quartz monzonite.

ramsdellite
A black or gray orthorhombic mineral form of manganese dioxide

romanechite
a mixed oxide mineral of manganese and barium which is an ore of manganese

romanechites
plural of romanechite

rutile
The most frequent of the three polymorphs of titanium dioxide, crystalizing in the tetragonal system, TiO₂.

rutiles
plural of rutile

sahlinite
A mineral composed of an arsenide, oxide and chloride of lead.

sahlinites
plural of sahlinite

samarskite
A shiny black radioactive mineral that contains a complex mixture of rare earth oxides

samarskites
plural of samarskite

schreyerite
A vanadium titanium oxide mineral found in Kenya; it is a polymorph of kyzylkumite.

shanyavskite
An amorphous aluminium hydroxide mineral.

shattuckite
A copper silicate hydroxide mineral.

shattuckites
plural of shattuckite

sordawalite
A greenish or greyish black mineral from Karelia, having conchoidal fracture and composed of silica, alumina, iron peroxide, magnesia, phosphoric acid, and water.

spinel
Any of several hard minerals of cubic symmetry that are mixed oxides of magnesium and aluminium and are used as gemstones of various colours.
Any crystalline material, not necessarily an oxide, that possesses the same crystal structure as this mineral.

spinelle
Dated form of spinel.

spinelles
plural of spinelle

spinels
plural of spinel

stibioclaudetite
A very rare mixed arsenic-antimony oxide mineral.

strontia
A pale earth composed of strontium oxide (SrO).

studtite
A secondary uranium mineral containing peroxide formed by the alpha-radiolysis of water during formation; it occurs as white yellow needlelike crystals often in acicular sprays.

tantalite
A dark-brown mineral that is an ore of tantalum and niobium, of the chemical formula (Fe, Mn) Ta₂O₆.

tantalites
plural of tantalite

tapiolite
A rare oxide mineral.

tellurite
A yellowish mineral, tellurium dioxide (TeO₂).

tellurites
plural of tellurite

tenorite
A mineral form of cupric oxide

tenorites
plural of tenorite

thorianite
A radioactive mineral containing thorium dioxide (ThO₂) plus oxides of uranium, lanthanum, cerium neodymium and praseodymium in smaller quantities.

thorianites
plural of thorianite

todorokite
A manganese oxide mineral, also containing calcium, barium, potassium, sodium, and sometimes magnesium that is a major constituent of manganese nodules

todorokites
plural of todorokite

tohdite
An artificial aluminium oxide hydrate the same as natural akdalaite.

tridymite
A rare mineral of volcanic rocks that solidified at a high temperature, with the chemical composition silicon dioxide, SiO₂. Tridymite is chemically identical to quartz, but has a different crystal structure. Sometimes contains sodium aluminum silicate, which seems to be expelled when quartz solidifies at lower temperatures.

tridymites
plural of tridymite

tsilaisite
A triclinic mineral containing sodium, manganese, aluminium, borate, silicate, and hydroxide.

tungstite
An orthorhombic hydrous tungsten oxide mineral formed by the weathering of other tungsten-containing minerals.

tungstites
plural of tungstite

ulvospinel
Alternative spelling of ulvöspinel.

ulvospinels
plural of ulvospinel

uraninite
Any of several brownish-black forms of uranium dioxide, UO₂, (especially pitchblende) that is the chief ore of uranium; it is isomorphous with thorianite.

uraninites
plural of uraninite

valentinite
An orthorhombic antimony oxide mineral.

vredenburgite
A rare manganese oxide mineral.

wadd
Alternative form of wad.

zirkelite
An isometric oxide mineral with the chemical formula (Ca,Th,Ce)Zr(Ti,Nb)₂O₇.

zirkelites
plural of zirkelite

abuite
A colorless mineral bearing calcium, aluminium, and phosphate.

adamite
A descendant of Adam; a human being.

adelite
A rare mineral, a calcium-magnesium arsenate, forming blue, green, yellow or grey orthorhombic crystals.

aerugite
A rare complex nickel arsenate mineral that forms green to deep blue-green trigonal crystals.

aerugites
plural of aerugite

agardite
Any of a group of copper arsenate minerals that contain varying proportions of several rare earth elements such as cerium, neodymium, lanthanum and yttrium.

agardites
plural of agardite

aleutite
A brittle, dark red vanadate and arsenate mineral occurring as a product of fumarolic activity.

aleutites
plural of aleutite.

alforsite
A hexagonal phosphate mineral of the apatite group, composed of barium, phosphorus, chlorine, and oxygen.

alluaudite
A metasomatic mineral that is an alkaline manganese iron phosphate.

alluaudites
plural of alluaudite

amblygonite
A mineral, a mixed fluoride and aluminophosphate of sodium and lithium that is an important ore of lithium.

amblygonites
plural of amblygonite

annabergite
A mineral consisting of a hydrous nickel arsenate, chemical formula Ni₃(AsO₄)₂·8H₂O, with an apple-green colour.

apatite
A calcium fluoride phosphate of variable composition, sometimes used in the manufacture of fertilizer, as a gemstone, and (in powdered form) as a pigment, and also produced biologically in bones and teeth.

apatites
plural of apatite