quercyite

(mineralogy, obsolete) A calcium phosphate mineral, now considered to not be officially approved.


melatope

Coined by A. Johannsen on page 420 in A Manual of Petrographic Methods McGraw-Hill 1918

(mineralogy, microscopy) An eye shape of concentric coloured optical fringes seen on a conoscopic interference pattern surrounding an optical axis. For biaxial minerals there are a pair of circles, like eyes.


phlogopitization

(mineralogy) Conversion into phlogopite.


picrochromite

(mineralogy) Synonym of magnesiochromite


silicocarbonatite

(mineralogy) A carbonatite that is rich in sodium.


lewistonite

(mineralogy) A carbonate-rich form of fluorapatite.


waxen vein

(mineralogy, obsolete) the Ludus Helmontii; argillaceous septaria


Pentelic marble

(mineralogy) A white marble with a uniform, faint yellow tint, quarried on Mount Pentelicus near Athens.


Picasso marble

(mineralogy) A marble metamorphosed in limestone, and mainly composed of silica, calcium carbonate and magnesium.


elkinstantonite

Named after NASA scientist Lindy Elkins-Tanton.

(mineralogy) A mineral with chemical formula Fe₄(PO₄)₂O.


elaliite

Named after the El Ali district in Somalia where a meteorite was found that contained the mineral, + -ite.

(mineralogy) A mineral with chemical formula Fe₉PO₁₂.


medmontite

(mineralogy) A rare, copper-bearing mineral of the montmorillonite group.


metamontmorillonite

(mineralogy) A dehydrated form of montmorillonite.


lovchorrite

(mineralogy) A rare silicate mineral with the chemical formula (◻,Ca,Na)3(Ca,REE)4Ti(Si2O7)2[H2O,OH,F]4 · H2O.


meta-autunite

en-noun

meta-autunite (countable and uncountable, plural meta-autunites)

(mineralogy) A dehydrated form of autunite.


carbonate-orthopyroxenite

carbonate-orthopyroxenite (countable and uncountable, plural carbonate-orthopyroxenites)


solvsbergite

solvsbergite (countable and uncountable, plural solvsbergites)


soda trachyte

soda trachyte (countable and uncountable, plural soda trachytes)

(mineralogy) A sodium-rich volcanic rock with a fine-grained texture.


tengerite

tengerite (usually uncountable, plural tengerites)

(mineralogy) A rare carbonate mineral with the chemical formula Y₂(CO₃)₃·2-3H₂O.


bravoite

bravoite (countable and uncountable, plural bravoites)

(mineralogy) A nickel-bearing variety of pyrite.


enderbite

enderbite (countable and uncountable, plural enderbites)

(mineralogy) An igneous rock of the charnockite series.


gaspéite

(mineralogy) A rare nickel carbonate mineral with the chemical formula (Ni,Fe,Mg)CO3.


kapellasite

Named after Greek mineral collector and trader Christo Kapellas.

(mineralogy) A cyan, trigonal mineral found in Greece.


arsenolamprite

(mineralogy) A shiny grey-white form of arsenic composed of orthorhombic crystals.


atlasite

(historical, organic chemistry, mineralogy) A discredited mineral, thought to be a mixture of azurite and atacamite.


ablykite

From Ablyk, a hamlet in Uzbekistan next to Angren in Ohangaran District, + -ite.

(mineralogy) A mineral discovered in Ablyk resembling halloysite


acanticonite

(mineralogy) Alternative form of epidote


fire obsidian

fire obsidian (countable and uncountable, plural fire obsidians)

(mineralogy) A rare variety of relatively clear volcanic glass that produces a vibrant color-reflectance caused by the inclusions of magnetite nanoparticles.


rainbow obsidian

rainbow obsidian (countable and uncountable, plural rainbow obsidians)

thin-film interference
thin-film interference

(mineralogy) A type of colorful, striped obsidian originating from Mexico which contains oriented nanorods of hedenbergite, causing the rainbow striping effects by thin-film interference.


sheen obsidian

sheen obsidian (countable and uncountable, plural sheen obsidians)

(mineralogy) A rare type of volcanic glass that forms when gas bubbles or mineral inclusions become trapped in layers of rapidly cooling lava.


glendonite

Named after the mineral's type locality, Glendon, New South Wales.

1909, Records of the Geological Survey of New South Wales, Volume 8, Geological Survey of New South Wales, page 178,
The abundance and wide horizontal distribution of the glendonites on certain horizons of the Upper Marine Series of the Permo-Carboniferous system of New South Wales, points to the probability that the original mineral was formed of some commonly occurring elements.

The term "glendonite" does not refer to a mineral, but to a class of pseudomorphs. A pseudomorph is a mineral that has taken the characteristic crystal shape of another mineral by processes such as replacement or recrystallization. Glendonites are pseudomorphs after the mineral ikaite, a monoclinic mineral with composition CaCO₃.₆H₂O.

2009, Ian P. Swainson, “Glendonite/Ikaite”, in Vivien Gornitz, editor, Encyclopedia of Paleoclimatology and Ancient Environments, Springer, page 396:

2021, Mikhail Rogov, Phanerozoic glendonite occurrences and their significance for palaeotemperature reconstruction, Ondřej Bábek, Stanislava Vodrážková (editors), 35th IAS Meeting of Sedimentology: Book of Abstracts, Palacký University Olomouc, page 383,
Here the preliminary results of glendonite distribution based on a comprehensive database are represented.

(geology, mineralogy) A pseudomorph of ikaite.


spilitization

spilitization (countable and uncountable, plural spilitizations)

(mineralogy) albitization of a basalt into spilite


spilitize

en-verb

spilitize (third-person singular simple present spilitizes, present participle spilitizing, simple past and past participle spilitized)

spilitizes (present singular third-person)
spilitizing (participle present)
spilitized (participle past)
spilitized (past)


-tomous

Possibly analogical to acrotomous, from Ancient Greek ἀκρότομος (akrótomos, “cut off sharp”), ultimately from Ancient Greek τόμος (tómos, “slice, something cut”).

der

(mineralogy, crystallography) Describes the cleavage of minerals


stetindite

Named after Stetind pegmatite, (Tysfjord, Nordland, Norway) where it was first discovered; officially named in 2008

(mineralogy) A tetragonal cerium silicate mineral

stetindite-(Ce) official name after 2016


corundophilite

(mineralogy) An iron-rich variety of clinochlore.


-philite

From Ancient Greek φῐ́λος (phĭ́los) + -ite.

(mineralogy) Forming names of minerals associated with a substance.


napoleonite

en-noun

napoleonite (countable and uncountable, plural napoleonites)

(mineralogy) A variety of diorite characterized by orbicular structure.


corsite

corsite (countable and uncountable, plural corsites)


crestmoreite

Named after Crestmore Heights in California, + -ite.

(mineralogy) A supposed mineral, later found to be a mixture of ellestadite and tobermorite.


penninite

penninite (countable and uncountable, plural penninites)

(mineralogy) A double silicate of aluminium and magnesium.


shanyavskite

(mineralogy) An amorphous aluminium hydroxide mineral.


ashanite

(mineralogy) A discredited mineral species containing niobium, tantalum, uranium, iron and manganese.


molybdosodalite

(mineralogy) A sodalite containing molybdenum.


wöhlerite

(mineralogy) A granular mineral containing oxygen, calcium, silicon, zirconium, niobium, sodium, fluorine and iron.


balliranoite

(mineralogy) A mineral with the formula ((Na,K)₆Ca₂(Si₆Al₆O₂₄)Cl₂(CO)₃).


aegerite

(mineralogy) Alternative form of aegirite


anorthose

anorthose (countable and uncountable, plural anorthoses)


bababudanite

(mineralogy) Synonym of magnesioriebeckite


batchelorite

(mineralogy) A green, slaty variety of muscovite.


belmontite

(mineralogy) A discredited mineral species that was originally described as a lead silicate.


calciodialogite

(mineralogy) Synonym of calciorhodochrosite


calciorhodochrosite

(mineralogy) A calcium-bearing variety of rhodochrosite.


chrompicotite

(mineralogy) A chromium-bearing variety of picotite.


cobaltoadamite

(mineralogy) A cobalt-bearing variety of adamite.


eichbergite

(mineralogy) An obsolete name for a mixture of jaskólskiite and bismuth-bearing meneghinite.


eisenbrucite

(mineralogy) An obsolete name for a mixture of brucite, chrysotile, hydromagnesite and pyroaurite.


ferrobrucite

(mineralogy) A variety of brucite that contains ferrous oxide.


ferronemalite

(mineralogy) A variety of nemalite that contains ferrous oxide.


ferropicotite

(mineralogy) A variety of picotite that contains ferrous oxide.


hokutolite

(mineralogy) A rare mineral containing radioactive radium elements generated by the hot spring environment.


hydrotroilite

(mineralogy) A mineral composed of hydrated iron sulfide.


imerinite

(mineralogy) Synonym of magnesioarfvedsonite


kämmererite

(mineralogy) A chromium-bearing variety of clinochlore.


låvenite

(mineralogy) A rare sorosilicate mineral of the wöhlerite group.


manganobrucite

(mineralogy) A manganese-bearing variety of brucite.


melnikovite

(mineralogy) A mixture of pyrite and marcasite.


metanatrolite

(mineralogy) A metamorphosed variety of natrolite.


metathenardite

(mineralogy) A metamorphosed variety of thenardite.


mosesite

(mineralogy) A very rare mercury mineral found as an accessory in deposits of mercury, often in conjunction with limestone.


natramblygonite

(mineralogy) Synonym of natromontebrasite


nicholsonite

(mineralogy) A zinciferous variety of aragonite.


oxyapatite

oxyapatite (countable and uncountable, plural oxyapatites)


pilbarite

(mineralogy) A mixture of thorogummite and kasolite.


platynite

(mineralogy) A discredited mineral species that is a mixture of galena and laitakarite.


poechite

(mineralogy) A silicate mineral with the formula H₁₆Fe₈Mn₂Si₃O₂₀.


poliopyrite

poliopyrite (countable and uncountable, plural poliopyrites)


pseudolaumontite

(mineralogy) A hydrous silicate mineral containing aluminium, iron, magnesium and potassium.


salmonsite

(mineralogy) A discredited mineral species, a mixture of jahnsite and hureaulite.


jahnsite

jahnsite (countable and uncountable, plural jahnsites)

(mineralogy) Any of a group of rare, complex monoclinic phosphate minerals.


tartuffite

(mineralogy) A discredited mineral species, a mixture of calcite and bitumen.


wolftonite

(mineralogy) Synonym of hydrohetaerolite


zamboninite

(mineralogy) A discredited mineral species, a mixture of fluorite and sellaite.


zincorhodochrosite

(mineralogy) A zinciferous variety of rhodochrosite.


cerianite

(mineralogy) A rare oxide mineral, belonging to uraninite group.


syenogabbro

syenogabbro (countable and uncountable, plural syenogabbros)

(mineralogy) A rock composed of syenite and gabbro.


kupfferite

(mineralogy) A deep green variety of amphibole.


chukhrovite

(mineralogy) Any of a group of rare sulfate-fluoride minerals.


heyrovskyite

(mineralogy) A sulfosalt mineral with the formula Pb₆Bi₂S₉.


hiortdahlite

(mineralogy) A rare sorosilicate mineral that contains zirconium, calcium, sodium and fluorine.


hjelmite

(mineralogy) A discredited mineral species.


hydrohausmannite

(mineralogy) A mixture of hausmannite and feitknechtite.


honeycomb quartz

honeycomb quartz (countable and uncountable, plural honeycomb quartzes)

(mineralogy) A form of quartz exhibiting a pattern characterized by a hollow mesh of hexagonal or cellular formations, reminiscent of the natural structure found in bee honeycombs.


aegirine-augite

aegirine-augite (countable and uncountable, plural aegirine-augites)


auerlite

(mineralogy) A phosphorus-bearing variety of thorite.


beegerite

(mineralogy) A discredited mineral species, a mixture of matildite and schirmerite.


brunsvigite

brunsvigite (countable and uncountable, plural brunsvigites)


coolgardite

(mineralogy) A mixture of coloradoite, calaverite, sylvanite and petzite.


dashkesanite

(mineralogy) A chloriniferous mineral containing sodium, potassium, iron and magnesium.


ferroaxinite

ferroaxinite (countable and uncountable, plural ferroaxinites)


fizélyite

(mineralogy) A rare sulfosalt mineral with the chemical formula Ag₅Pb₁₄Sb₂₁S₄₈.


götzenite

(mineralogy) A mineral of the seidozerite supergroup.


griqualandite

(mineralogy) An altered form of crocidolite.


hexagonite

hexagonite (countable and uncountable, plural hexagonites)


hydroxysodalite

hydroxysodalite (countable and uncountable, plural hydroxysodalites)

(mineralogy) A mineral with the chemical formula Al₃HNa₄O₁₃Si₃.


ishikawaite

(mineralogy) A rare mineral composed of uranium, niobium, iron, tantalum, and yttrium.


joséite

(mineralogy) A rare telluride-sulfide mineral.


nováčekite

(mineralogy) An uranyl arsenate mineral.


nybøite

(mineralogy) A double chain inosilicate mineral.


diaboleite

(mineralogy) A blue-colored mineral with formula Pb₂CuCl₂(OH)₄.


pseudowollastonite

(mineralogy) A very rare cyclosilicate mineral.


mosandrite

(mineralogy) A rare sorosilicate mineral consisting of sodium, calcium, zirconium, titanium and cerium.


roepperite

(mineralogy) A manganoan variety of fayalite.


rowlandite

(mineralogy) A rare yttrium silicate mineral.


strüverite

(mineralogy) A tantalum-bearing variety of rutile.


tawmawite

(mineralogy) A chromium-bearing variety of epidote.


trögerite

(mineralogy) A rare secondary mineral composed of uranyl arsenate.


vredenburgite

(mineralogy) A rare manganese oxide mineral.


yttrotungstite

(mineralogy) A rare mineral consisting of calcium, yttrium, magnesium, aluminium, iron, silicon, hydrogen and tungsten.


hörnesite

(mineralogy) An arsenate mineral bearing magnesium.


manganoblödite

(mineralogy) A rare manganese mineral with the formula Na₂Mn(SO₄)₂·4H₂O.


cobaltoblödite

(mineralogy) A rare cobalt mineral with the formula Na₂Co(SO₄)₂·4H₂O.


nickelblödite

(mineralogy) A rare nickel sulfate mineral with the formula Na₂Ni(SO₄)₂.


klöchite

(mineralogy) A cyclosilicate mineral of the osumilite group.


kozyrevskite

(mineralogy) An arsenate analogue of milkovoite.


milkovoite

(mineralogy) A rare copper phosphate-arsenate mineral with the chemical formula Cu₄O(PO₄)(AsO₄).


karlditmarite

(mineralogy) A rare copper phosphate-sulfate mineral with the chemical formula Cu₉O₄(PO₄)₂(SO₄)₂.


ericlaxmanite

(mineralogy) A rare copper arsenate mineral with the chemical formula Cu₄O(AsO₄)₂.


magnesio-fluoro-hastingsite

(mineralogy) A calcium amphibole mineral with the chemical formula NaCa₂(Mg₄Fe₃₊)Si₆Al₂)O₂₂F₂.


oxo-magnesio-hastingsite

(mineralogy) A double chain inosilicate mineral with the chemical formula NaCa₂(Mg₂Fe³⁺₃)(Si₆Al₂)O₂₂O₂.


potassic-hastingsite

(mineralogy) A calcium amphibole mineral with the chemical formula KCa₂(Fe₂₊₄Fe₃₊)Al₂Si₆O₂₂)(OH)₂.


potassic-arfvedsonite

(mineralogy) A sodium amphibole mineral with the chemical formula [(K,Na)][Na₂][Fe₂₊₄Fe₃₊]Si₈O₂₂(OH)₂.


potassic-richterite

(mineralogy) A sodium-calcium amphibole mineral with the chemical formula {K}{CaNa}{Mg₅}Si₈O₂₂(OH)₂.


fluoro-sodic-ferropedrizite

(mineralogy) Synonym of ferro-fluoro-pedrizite


ferro-fluoro-pedrizite

(mineralogy) A lithium amphibole mineral with the chemical formula Na(Li₂)(Fe₂₊₂Al₂Li)[Si₈O₂₂]F₂.


pedrizite

pedrizite (countable and uncountable, plural pedrizites)

(mineralogy) Any of a group of rare lithium amphibole minerals.


lehiite

(mineralogy) A discredited mineral, now known to be crandallite.


jaulingite

Jauling + -ite; it was found in Jauling, near Sankt Veit, in Lower Austria.

(mineralogy) A resinous variety of amber.


black opal

(gemology, mineralogy) A rare, precious gemstone that is dark in color and is known for its play of color.


play of color

plays of color (plural)
play-of-color (alternative)

(gemology, mineralogy) An optical phenomenon that occurs when light interacts with a gemstone, causing it to appear to change color.


knasibfite

Named for its chemical composition, being made up of potassium, sodium, silicon, boron, and fluorine (K, Na, Si, B, F).

(mineralogy) An orthorhombic, vitreous mineral found in Sicily.


williamsite

williamsite (countable and uncountable, plural williamsites)

(mineralogy) A translucent green variety of antigorite sometimes used as a gem.


gladkaite

(mineralogy) A certain diorite aplite mineral.


plagiaplite

(mineralogy) A form of gladkaite with less quartz.


woodendite

(mineralogy) A basaltic igneous rock found in Victoria, Australia.


burkite

(mineralogy) Alternative form of burkeite


orvietite

(mineralogy) A mineral consisting of a mixture of plagioclase and sanidine with smaller amounts of leucite and augite, etc.