pharmacosiderite
A hydrated basic ferric arsenate, consisting of the elements arsenic, iron, hydrogen, potassium, sodium and oxygen.

pharmacosiderites
plural of pharmacosiderite

phosphophyllite
A rare bluish-green hydrated zinc phosphate mineral.

phosphophyllites
plural of phosphophyllite

phosphorite
a sedimentary rock rich in phosphate minerals such as apatite

phosphorites
plural of phosphorite

phoxite
A mineral containing ammonium, magnesium, phosphate and oxalate

przhevalskite
A vitreous, orthorhombic yellow or green phosphate mineral.

pseudolyonsite
A monoclinic copper vanadate mineral with formula Cu₃(VO₄)₂

pucherite
vanadate of bismuth, occurring in minute reddish-brown crystals

purpurite
A manganese phosphate mineral with a striking purple colour.

pyromorphite
A yellowish-green mineral, a mixed phosphate and chloride of lead with the chemical formula Pb₅(PO₄)₃Cl that is sometimes mined as an ore.

pyromorphites
plural of pyromorphite

quercyite
A calcium phosphate mineral, now considered to not be officially approved.

raadeite
A colorless mineral, heptamagnesium diphosphate octahydroxy: Mg₇(PO₄)₂(OH)₈.

reznitskyite
A rare vanadate mineral with the chemical formula CaMg(VO4)F.

rosieresite
An amorphous hydrous phosphate of aluminium with lead and copper.

santabarbaraite
An amorphous ferric hydroxy phosphate mineral hydrate.

sarcopside
A phosphate mineral of manganese, magnesium, and iron

sarcopsides
plural of sarcopside

sarkinite
A red, crystalline form of manganese arsenate, Mn₂²⁺(AsO₄)(OH); polyarsenite.

scorzalite
A dark blue phosphate mineral containing iron, magnesium, and aluminium phosphate.

sincosite
A mixed calcium and vanadyl phosphate mineral that occurs in tetragonal scales or plates

sombrerite
A hard impure calcium phosphate.

tangeite
A calcium, copper vanadate mineral, CaCu(VO₄)(OH)

tangeites
plural of tangeite

tokyoite
A rare vanadate mineral.

tokyoites
plural of tokyoite

torbernite
A radioactive green phosphate mineral, isostructural with autunite, found in granites and other uranium-bearing deposits as a secondary mineral.

torbernites
plural of torbernite

triplite
A rare manganese-bearing phosphate mineral.

triplites
plural of triplite

triploidite
An uncommon monoclinic manganese iron phosphate mineral.

turneaureite
A brown mineral that is a mixed arsenate, phosphate and chloride of calcium

ulrichite
A rare green uranium phosphate mineral.

vanadinite
A reddish mineral, a mixed chloride and vanadate of lead with the chemical formula Pb₅(VO₄)₃Cl, that is commercial source of vanadium.

vanadinites
plural of vanadinite

vantasselite
A rare, white, orthorhombic aluminium phosphate mineral.

vauquelinite
A complex mineral, a combined chromate and phosphate of copper and lead.

vauquelinites
plural of vauquelinite

vauxite
A phosphate mineral of the laueite–paravauxite group.

viseite
A mixed, hydrated silicate, phosphate and fluoride of calcium and aluminium.

wagnerite
A combined phosphate and fluoride of iron and magnesium.

wakefieldite
Any of four uncommon rare earth element vanadate minerals, each containing oxygen and vanadium, but otherwise containing different elements.

wakefieldites
plural of wakefieldite

walpurgite
A hydrated arsenate/oxide of bismuth and uranium.

walpurgites
plural of walpurgite

wardite
A hydrous sodium aluminium phosphate hydroxide mineral, of interest for its rare tetragonal trapezohedral crystallography.

wavellite
A hydrated aluminium phosphate, Al₃(PO₄)₂(OH,F)₃·5H₂O, sometimes mined as a source of phosphorus.

wavellites
plural of wavellite

weilite
A rare white triclinic arsenate mineral with waxy lustre.

whiteite
A rare monoclinic hydrated phosphate mineral.

whitlockite
A rare form of calcium phosphate.

whitlockites
plural of whitlockite

xanthiosite
A phosphate mineral first discovered in Germany in 1858.

xenotime
A yellow-brown mineral, yttrium phosphate (YPO₄)

xenotimes
plural of xenotime

xenotine
Dated form of xenotime.

yukonite
An arsenate mineral.

zanazziite
A complex phosphate with the chemical formula Ca₂(Mg,Fe)(Mg,Fe,Mn,Al)₄Be₄(OH)₄(PO₄)₆·6H₂O, having a pale to dark olive-green colour.

zdenekite
A blue monoclinic mineral, a sodium, lead copper arsenate chloride

ziesite
A copper vanadate mineral.

zigrasite
A phosphate mineral with the chemical formula MgZr(PO₄)₂(H₂O)₄.

zinclipscombite
A dark-green to brown zinc iron phosphate mineral with the formula Zn(Fe³⁺)₂(PO₄)₂(OH)₂.

abramovite
A very rare mineral with chemical formula Pb₂SnInBiS₇, found in tiny elongated lamellar crystals.

absarokite
A basaltic-trachyandesite rock containing phenocrysts of olivine and augite

absarokites
plural of absarokite

abswurmbachite
A tetragonal copper manganese silicate mineral with a metallic lustre.

abswurmbachites
plural of abswurmbachite

acanticone
Alternative form of epidote.

acanticones
plural of acanticone

acanticonite
Alternative form of epidote.

acapulcoite
A primitive achondrite composed of fine-grained olivine, orthopyroxene, plagioclase and troilite.

acapulcoites
plural of acapulcoite

achate
An agate.

achlusite
Synonym of sodium mica.

achroite
A colourless form of tourmaline

achroites
plural of achroite

actinolite
A mineral with monoclinic crystals of the chemical formula Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂, belonging to the amphibole group.

actinolites
plural of actinolite

activater
Alternative spelling of activator.

activaters
plural of activater

activator
One who, or that which, activates.
Something that activates a catalyst
Any chemical or agent which regulates one or more genes by increasing the rate of transcription.
A type of effector that increases the rate of enzyme-mediated reactions.
A type of dopant used in phosphors and scintillators.
An agent that enables the flotation of a mineral or minerals.
A hand-held device that delivers a controlled fast thrust to a joint, muscle, etc., to help stimulate nervous system activity.

activators
plural of activator

actynolite
Alternative form of actinolite.

adularia
A variety of orthoclase feldspar found as colorless to white prismatic crystals in cavities in metamorphic rocks. Some specimens reflect a bluish sheen along crystal faces. This phenomenon is called adularescence, and adularia with this property is called moonstone. (See sanidine).

adularias
plural of adularia

adventurine
Alternative form of aventurine.

adventurines
plural of adventurine

aegirinaugite
Alternative form of aegirine-augite.

aegirine
A mineral with monoclinic crystals with the chemical formula NaFe³⁺(Si₂O₆) belonging to the pyroxene group.

aegirines
plural of aegirine

aenigmatite
An inosilicate mineral of sodium, iron, and titanium, forming brown to black triclinic lamellar crystals.

aenigmatites
plural of aenigmatite

agate
A semitransparent, uncrystallized silicate mineral and semiprecious stone, presenting various tints in the same specimen, with colors delicately arranged and often curved in parallel alternating dark and light stripes or bands, or blended in clouds; various authorities call it a variety of chalcedony, a variety of quartz, or a combination of the two.
The size of type between pearl and nonpareil, standardized as 5+¹⁄₂-point.
One fourteenth of an inch.
A diminutive person; so called in allusion to the small figures cut in agate for rings and seals.
A tool used by gold-wire drawers, bookbinders, etc.;—so called from the agate fixed in it for burnishing.
A marble made from agate.
A testicle.

agates
plural of agate

aggat
Obsolete spelling of agate.

aggats
plural of aggat

agrellite
A mineral with the chemical formula NaCa₂FSi₄O₁₀

agrellites
plural of agrellite

agricolaite
A mineral with the chemical formula K₄(UO₂)(CO₃)₃.

akdalaite
A white hexagonal mineral with chemical formula 4Al₂O₃·H₂O found in Kazakhstan.

akdalaites
plural of akdalaite

alarsite
A trigonal mineral with the chemical formula Al[AsO₄].