breithauptite
A nickel antimonide mineral with the chemical formula NiSb, having a metallic opaque copper-red appearance.

breithauptites
plural of breithauptite

brewsterite
Any of a series of hydrothermal tectosilicate minerals of the zeolite group.

brownleeite
A silicide mineral with chemical formula MnSi.

brownmillerite
A mineral with the chemical formula Ca₂(Al,Fe⁺⁺⁺)₂O₅, found in metamorphosed limestone.

buddingtonite
An ammonium feldspar with a vitreous lustre.

buergerite
A cyclosilicate mineral related to tourmaline.

buergerites
plural of buergerite

buetschliite
A grayish-yellow trigonal mineral with the chemical formula K2Ca(CO₃)₂.

buseckite
A mineral with the chemical formula (Fe,Zn,Mn)S.

cabriite
A grey-white mineral with the chemical formula Pd₂SnCu.

cadwaladerite
A yellow mineral with the chemical formula Al(OH)C₂|4H₂O.

calciovolborthite
A mineral with chemical formula CaCuVO₄(OH), closely related to volborthite.

calciovolborthites
plural of calciovolborthite

camptonite
A lamprophyre containing plagioclase and feldspar.

camptonites
plural of camptonite

cancrinite
Any of a family of feldspathoid minerals that are mixed carbonates and aluminosilicates of sodium and calcium.

cancrinites
plural of cancrinite

caolinite
Alternative form of kaolinite.

caolinites
plural of caolinite

caracolite
A monoclinic-prismatic mineral with the chemical formula Na₃Pb₂(SO₄)₃Cl.

carnegieite
An (often synthetic) feldspar similar to nepheline

carnegieites
plural of carnegieite

celadonite
A blueish-green form of mica.

celadonites
plural of celadonite

celsian
An uncommon monoclinic feldspar mineral, barium aluminosilicate, found in contact metamorphic rocks with significant barium content.

cerite
A hydrous silicate of cerium (and other metals).
A horn-shaped cerithiid shell.

cerites
plural of cerite

cernyite
A cadmium analog of stannite, with chemical formula Cu₂CdSnS₄.

cerolite
Alternative form of kerolite.

cervandonite
A rare arsenosilicate mineral.

cervandonites
plural of cervandonite

chabasie
Obsolete form of chabazite.

chabasies
plural of chabasie

chabasite
Alternative form of chabazite.

chabasites
plural of chabasite

chabazite
Any of several zeolite minerals that occur in basaltic rocks.

chabazites
plural of chabazite

chapmanite
A rare nesosilicate mineral, an iron antimony silicate closely related to bismutoferrite.

chapmanites
plural of chapmanite

charnockite
An orthopyroxene-bearing quartz-feldspar rock.

charnockites
plural of charnockite

chassignite
An achondrite composed mostly of olivine

chassignites
plural of chassignite

chenite
A particular kind of sky blue mineral found on galena and chalcopyrite with the chemical formula Pb₄Cu(SO₄)₂(OH)₆.

chenxianite
A black rhombohedral mineral with the chemical formula AlMn11O16(OH)9.

chernobylite
A technogenic crystalline zirconium silicate containing uranium as a solid solution, discovered in the corium produced by the Chernobyl nuclear accident.

chesterite
A basic inosilicate of magnesium and iron.

chevkinite
A monoclinic sorosilicate mineral containing rare earths, magnesium, iron and titanium.

chiastolite
An aluminosilicate mineral having carbon inclusions, a variety of andalusite.

chiastolites
plural of chiastolite

chipolin
Alternative form of cipolin (“type of marble”).

chkalovite
A rare mineral, sodium beryllium silicate.

chkalovites
plural of chkalovite

chlorite
A dark green mineral resembling serpentine, being a mixed silicate of magnesium, iron and aluminium.
Any salt of chlorous acid.

chlorites
plural of chlorite

chloritoid
A mixed iron, magnesium, and manganese silicate mineral of metamorphic origin, with the chemical formula (Fe²⁺,Mg,Mn)₂Al₄Si₂O₁₀(OH)₄.

chloritoids
plural of chloritoid

chlorocalcite
A rare white mineral, chemical formula KCaCl₃.

chloropal
A massive mineral, greenish in colour and opal-like in appearance, essentially a hydrous silicate of iron.

chloropals
plural of chloropal

chlorothionite
An orthorhombic-dipyramidal light blue mineral with the chemical formula K₂Cu(SO₄)Cl₂.

chromoleucite
A chromoplastid.

chromoleucites
plural of chromoleucite

chrysocolla
A vitreous silicate mineral that is a minor ore of copper, with the chemical formula (Cu²⁺,Al)₂H₂Si₂O₅(OH)₄·nH₂O.

chrysocollas
plural of chrysocolla

chrysotile
A fibrous silicate mineral with the chemical formula Mg₃(Si₂O₅)(OH)₄; a form of serpentine asbestos.

chrysotiles
plural of chrysotile

chvaleticeite
A soft monoclinic mineral with chemical formula (Mn,Mg)SO₄·6H₂O.

cipolin
A white-green wavy-banded form of marble, used in buildings in Ancient Greece and Ancient Rome. It consists of coloured veins of epidote and chlorite.

cipolins
plural of cipolin

cipollino
Alternative form of cipolin (“type of marble”).

cipollinos
plural of cipollino

clinoamphibole
Any monoclinic form of an amphibole

clinoamphiboles
plural of clinoamphibole

clinochrysotile
A soft, fibrous silicate mineral in the serpentine group of phyllosilicates, also called "white asbestos".

clinochrysotiles
plural of clinochrysotile

clinoenstatite
A form of pyroxene, consisting of magnesium silicate, found in some meteorites.

clinoenstatites
plural of clinoenstatite

clinohedrite
A monoclinic-domatic mineral that is a mixed silicate of calcium and zinc

clinohedrites
plural of clinohedrite

clinohypersthene
A monoclinic magnesium-iron silicate present in some basalts

clinohypersthenes
plural of clinohypersthene

clinoptilolite
A natural zeolite comprising a microporous arrangement of silica and alumina tetrahedra.

clinoptilolites
plural of clinoptilolite

clinopyroxene
Any pyroxene that has a monoclinic crystal structure.

clinopyroxenes
plural of clinopyroxene

clinozoisite
A basic calcium aluminosilicate found in crystalline schists, a metamorphic product of calcium feldspar.

clinozoisites
plural of clinozoisite

clintonite
A calcium magnesium aluminium phyllosilicate mineral of the margarite group of micas.

clintonites
plural of clintonite

coffinite
A brown or black uranium-bearing silicate mineral.

coffinites
plural of coffinite

cordierite
A magnesium iron aluminium cyclosilicate.

cordierites
plural of cordierite

cornubite
A mineral containing arsenic, copper, hydrogen, and oxygen with chemical formula Cu₅(AsO₄)₂(OH)₄.

cristobalite
A mineral of volcanic rocks that solidified at a high temperature. Cristobalite is chemically identical to quartz, with the chemical formula SiO₂, but has a different crystal structure. Crystals are always microscopic, and usually form small rounded masses.

cristobalites
plural of cristobalite

cristoballite
Alternative form of cristobalite.

crossite
An inosilicate double-chain sodic amphibole mineral of the riebeckite group, now discredited.

crossites
plural of crossite

cyanite
Alternative form of kyanite.

cyanites
plural of cyanite

cymrite
A mineral, belonging to the zeolite family, that consists of a basic aluminosilicate of barium.

cymrites
plural of cymrite

dachiardite
A particular zeolite mineral.

dachiardites
plural of dachiardite

damourite
A kind of muscovite, or potash mica, containing water.

damourites
plural of damourite

dannemorite
A mineral with chemical formula Mn₂Fe₅Si₈O₂₂(OH)₂.

datholite
Alternative spelling of datolite.

datholites
plural of datholite

datolite
A borosilicate of lime commonly occurring in glassy, greenish crystals, with the chemical formula CaBSiO₄(OH).

datolites
plural of datolite

diallage
A figure of speech in which multiple arguments are brought to bear on a single point.
A green form of pyroxene.

diallages
plural of diallage

dickite
A phyllosilicate clay mineral chemically composed of aluminium, silicon, hydrogen and oxygen.

dickites
plural of dickite

diopside
A monoclinic pyroxene mineral, a magnesium calcium silicate with the chemical formula CaMgSi₂O₆, found in igneous and metamorphic rocks.

diosmectite
A mixed silicate or aluminium and magnesium that is used as an intestinal adsorbent