felsobanyite
Synonym of gibbsite.

felsophyre
A porphyritic volcanic rock composed primarily of feldspar and quartz.

felstone
Felsite.

felstones
plural of felstone

femaghastingsite
A magnesiferous variety of hastingsite.

fenaksite
A triclinic-pinacoidal mineral containing calcium, fluorine, hydrogen, iron, manganese, oxygen, potassium, silicon, and sodium.

fencooperite
A trigonal-ditrigonal pyramidal mineral containing aluminum, barium, carbon, chlorine, hydrogen, iron, oxygen, and silicon.

fengite
A transparent form of marble or alabaster, formerly sometimes used for windows.

fenite
A metasomatic rock often containing carbonatite intrusions

fenites
plural of fenite

ferberite
A monoclinic-prismatic black mineral containing iron, oxygen, and tungsten.

ferberites
plural of ferberite

ferchromide
An isometric-hexoctahedral gray white mineral that is an alloy of chromium and iron.

fermorite
A hexagonal-dipyramidal mineral containing arsenic, calcium, hydrogen, oxygen, phosphorus, and strontium.

fernandinite
A monoclinic-prismatic dark green mineral containing calcium, hydrogen, oxygen, and vanadium.

ferraioloite
A rare mineral with formula MgMn²⁺₄(Fe²⁺_(0.5)Al_(0.5))₄Zn₄(PO₄)₈(OH)₄(H₂O)₂₀, related to falsterite.

ferrarisite
A triclinic-pinacoidal mineral containing arsenic, calcium, hydrogen, and oxygen.

ferribeidellite
A form of beidellite containing iron

ferribeidellites
plural of ferribeidellite

ferrifayalite
Synonym of laihunite.

ferrilotharmeyerite
A monoclinic-prismatic mineral containing arsenic, calcium, copper, hydrogen, iron, lead, oxygen, and zinc.

ferrimolybdite
An orthorhombic mineral containing hydrogen, iron, molybdenum, and oxygen.

ferrinatrite
A trigonal-rhombohedral mineral containing hydrogen, iron, oxygen, sodium, and sulfur.

ferripyrophyllite
The ferric iron analogue of pyrophyllite.

ferripyrophyllites
plural of ferripyrophyllite

ferrisicklerite
An orthorhombic-dipyramidal mineral containing iron, lithium, manganese, oxygen, and phosphorus.

ferristrunzite
A triclinic mineral containing hydrogen, iron, oxygen, and phosphorus.

ferrisurite
A monoclinic mineral containing aluminum, carbon, copper, fluorine, hydrogen, iron, lead, oxygen, silicon, and sodium.

ferrisymplesite
An amorphous mineral containing arsenic, hydrogen, iron, and oxygen.

ferritungstite
An isometric-hexoctahedral mineral containing calcium, hydrogen, iron, oxygen, potassium, sodium, and tungsten.

ferroalluaudite
A monoclinic-prismatic blue green mineral containing calcium, iron, magnesium, manganese, oxygen, phosphorus, and sodium.

ferroaxinite
Synonym of axinite.

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

ferrobasalt
An iron-rich basalt.

ferrobustamite
A triclinic-pinacoidal green mineral containing calcium, iron, manganese, oxygen, and silicon.

ferrocalcite
siderite

ferrocarpholite
An orthorhombic-dipyramidal mineral containing aluminum, hydrogen, iron, magnesium, manganese, oxygen, silicon, and titanium.

ferroceladonite
A monoclinic-prismatic dark bluish green mineral containing hydrogen, iron, oxygen, potassium, and silicon.

ferrocolumbite
A black mineral that is an ore of niobium and tantalum.

ferrocolumbites
plural of ferrocolumbite

ferrodiorite
A dioritoid enriched in iron and titanium.

ferrodistortion
distortion to the structure of a crystal lattice due to ferromagnetism

ferrodistortions
plural of ferrodistortion

ferrogedrite
An orthorhombic-dipyramidal mineral containing aluminum, hydrogen, iron, oxygen, and silicon.

ferrogedrites
plural of ferrogedrite

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

ferrohastingsite
A ferriferous hastingsite.

ferroholmquistite
An orthorhombic-dipyramidal mineral containing aluminum, fluorine, hydrogen, iron, lithium, magnesium, manganese, oxygen, potassium, silicon, and sodium.

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

ferrohornblendes
plural of ferrohornblende

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

ferrokentbrooksite
A trigonal-ditrigonal pyramidal mineral containing aluminum, calcium, chlorine, fluorine, hafnium, hydrogen, iron, manganese, niobium, oxygen, potassium, silicon, sodium, strontium, tantalum, titanium, yttrium, and zirconium, as well as lanthanum, cerium, praeseodymium, neodymium, and samarium.

ferrokinoshitalite
A dark green iron mineral related to kinoshitalite.

ferrolyomesophase
A ferronematic phase of a liquid crystal

ferrolyomesophases
plural of ferrolyomesophase

ferronickelplatinum
A tetragonal-ditetragonal dipyramidal silver white mineral containing iron, nickel, and platinum.

ferronigerite
A rare mineral containing iron, niobium, and titanium.

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

ferrorhodsite
An isometric-hexoctahedral black mineral containing copper, iridium, iron, platinum, rhodium, and sulfur.

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

ferroselite
An orthorhombic-dipyramidal mineral containing iron and selenium.

ferrosilite
An orthorhombic-dipyramidal mineral containing iron, magnesium, oxygen, and silicon.

ferrostrunzite
A triclinic mineral containing hydrogen, iron, oxygen, and phosphorus.

ferrosyenite
A ferriferous syenite.

ferrotantalite
The iron-rich form of tantalite.

ferrotantalites
plural of ferrotantalite

ferrotitanowodginite
A monoclinic-prismatic mineral containing iron, oxygen, tantalum, and titanium.

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

ferrotychite
An isometric-diploidal mineral containing carbon, iron, oxygen, sodium, and sulfur.

ferrowodginite
A monoclinic-prismatic mineral containing iron, oxygen, tantalum, and tin.

ferrowyllieite
A monoclinic-prismatic mineral containing aluminum, calcium, iron, magnesium, manganese, oxygen, phosphorus, and sodium.

ferruccite
An orthorhombic-dipyramidal mineral containing boron, fluorine, and sodium.

fersmanite
A monoclinic-prismatic mineral containing calcium, fluorine, niobium, oxygen, silicon, sodium, strontium, and titanium.

fersmite
An orthorhombic-dipyramidal mineral containing calcium, cerium, fluorine, hydrogen, niobium, oxygen, sodium, tantalum, thorium, titanium, and yttrium.

feruvite
A trigonal-ditrigonal pyramidal mineral containing aluminum, boron, calcium, hydrogen, iron, magnesium, oxygen, silicon, sodium, and titanium.

fervanite
A monoclinic mineral containing hydrogen, iron, oxygen, and vanadium.

fetiasite
A monoclinic-prismatic creamy white mineral containing arsenic, iron, oxygen, and titanium.

fettelite
A monoclinic-sphenoidal grayish white mineral containing antimony, arsenic, copper, iron, lead, mercury, silver, sulfur, and thallium.

fianelite
A monoclinic-prismatic orange red mineral containing arsenic, hydrogen, manganese, oxygen, and vanadium.

fibroferrite
A trigonal-rhombohedral mineral containing hydrogen, iron, oxygen, and sulfur.

fibrolite
Sillimanite.

fibrolites
plural of fibrolite

fichtelite
A rare white monoclinic organic mineral, 7-isopropyl-1,4a-dimethyl-dodecahydro-1H-phenanthrene, found in fossilized wood from Bavaria.

fiedlerite
A triclinic-pinacoidal mineral containing chlorine, fluorine, hydrogen, lead, and oxygen.

filatovite
A monoclinic-prismatic colorless mineral containing aluminum, arsenic, copper, iron, oxygen, phosphorus, potassium, silicon, sodium, and zinc.

filipstadite
An orthorhombic-dipyramidal mineral containing aluminum, antimony, iron, magnesium, manganese, and oxygen.