Drag mouse
to rotate!

Abhurite

Thin tabular {0001}

Adamite

{101}, {110}, {111}

Adamite

{101}, modified

Adamite

{100}, {110}, {011}, modified

Aegirine

{661}, {110}, modified

Aeschynite

{110}, {021}, {010}, {001}

Aeschynite

{011}, {120}, {010}, modified

Aeschynite

Tabular {010}

Albite

{010}, {001}, {110}, {110}, {111}, {111}

Albite

{101}, {001}, {010}, modified

Albite

{010}, {001}, {101}, modified

Albite

Pericline law twin with rhombic section

Albite

Combined albite law and Karlsbad law twin

Albite

{110}, {010}, {111}, modified

Allactite

Tabular {100}

Allanite

Tabular {100},

Allanite

Tabular {100},

Alstonite

Pseudohexagonal cyclic twin

Altaite

{100}

Altaite

{100}, {111}

Alunite

{102}, {001}

Amphibole

{110}, {010}, {011}, {201}

Amphibole

Short prismatic [001], highly modified

Analcime

{100} modified by {211}

Analcime

{211}

Analcime

{100}

Analcime

{211}, {322}

Analcime

{211}, modified by {100}, {111}

Anatase

{101}

Anatase

{101}, {001}

Anatase

{101}, {205}

Anatase

{101}, {6.4.19}, {001}

Anatase

{101}, modified

Anatase

{101}, {001}, modified

Anatase

{305}, {107}, modified

Anatase

{101}, {001}, modified

Anatase

{101}, {107}, {1.1.14}, modified

Anatase

{307}, {101}, modified

Anatase

Penetration twin on {112}

Ancylite

{110}, {011}

Andalusite

{110}, {001}, modified

Andalusite

{110}, {001}, modified

Andalusite

{110}, {001}, modified

Andalusite

{110}, {011}, modified

Andorite

Short prismatic [001]

Andorite

Tabular {010}

Anglesite

{101}, {210}

Anglesite

{101}, {210}, {001}

Anglesite

{101}, {210}, {211}, {001}

Anglesite

{011}, {111}, modified

Anglesite

{001}, {010}, {210}, modified

Anglesite

{111}, {101}

Anglesite

{410}, {011}, {001}, modified

Anglesite

{101}, {210}, {011}, modified

Anglesite

{102}, {011}, modified

Anglesite

{102}, {210}, modified

Anglesite

{210}, {001}, modified

Anglesite

{111}, {011}, modified

Anhydrite

{100}, {010}, {011}

Anhydrite

{100}, {010}, {001}, {045}

Anhydrite

{100}, {010}, {001}, modified

Anhydrite

{101}, {053}, modified

Anhydrite

Several prisms {h0l}, {011}

Anhydrite

Contact twin on {021}

Anorthite

{201}, {001}, {010}, modified

Anorthite

{010}, {201}, {001}, modified

Antimony

{102}

Antimony

{104}

Antimony

{014}, {001}

Antimony

{014}, {001}, modified

Antimony

Fourling twin on {014}

Antimony

{102}, {001}

Antimony

Contact twin on {014}

Antimony

Contact twin on {014}

Antimony

Contact twin on {014}

Apatite

{100}, {001}

Apatite

{100}, {101}

Apatite

{100}, {001}, {101}

Apatite

{100}, {001}, modified

Apatite

{100}, {001}, modified

Apatite

{100}, {001}, modified

Apatite

Highly modified crystal

Apatite

{100}, {101}, modified

Apatite

Penetration twin on {111}

Apatite

{100}, {111}, {001}, modified

Aphthitalite

Tabular {001}

Aphthitalite

Tabular {001}

Apophyllite

{110}, {101}

Apophyllite

{110}, {001}, {101}

Apophyllite

{101}, {110}, {310}

Apophyllite

{110}, {001}, modified

Apophyllite

{101}, {1.1.10}, modified

Apophyllite

Tabular {001}, modified

Aragonite

{110}, {001}

Aragonite

{110}, {011}, {001}

Aragonite

Contact twin on {110}

Aragonite

{110}, {021}

Aragonite

{110}, {010}, {011}, modified

Aragonite

{110}, {010}, prisms {0kl}

Aragonite

Repeated penetration twin on {110}

Aragonite

Repeated contact twin on {110}

Aragonite

Repeated contact twin on {110}

Aramayoite

Tabular {010}

Ardennite

Prisms {hk0}, {010}, {323}, modified

Argentite

{111}, {100}

Argentite

Parallel growth of octahedra

Argentite

{100}, modified

Argyrodite

Penetration twin on [111]

Arsenic

{102}

Arsenic

{014}

Arsenic

Penetration twin on {104}

Arsenopyrite

{110}, {021}

Arsenopyrite

{110}, {012}

Arsenopyrite

Penetration twin on {201}

Arsenopyrite

Repeated contact- and penetration twin on {201}

Arsenopyrite

Prismatic {011}, {110}, modified

Arsenopyrite

Repeated penetration twin on {110}

Atacamite

{110}, {011}, {010}, modified

Atacamite

{110}, {011}

Atacamite

{110}, {011}, modified

Atacamite

Short prismatic {011}

Atacamite

Penetration twin on {544}

Atacamite

Tabular {010}

Atacamite

Prismatic [001]

Augelite

{001}, {110}, modified

Augelite

{001}, {110}, {201}

Augite

{100}, {110}, {011}, modified

Augite

Contact twin on {100}

Avogadrite

Tabular {100}

Axinite

{110}, {010}, {011}, modified

Axinite

{110}, {010}, {011}, modified

Axinite

{011}, {111}, {010}, modified

Azurite

{110}, {001}, {111}

Azurite

{110}, {111}, modified

Azurite

{001}, {102}, {011}, modified

Azurite

Prismatic [010], highly modified

Azurite

Prismatic [010]

Babingtonite

Isometric

Baddeleyite

Contact twin on {100}

Barite

{101}, {210}

Barite

{001}, {011}, {101}, modified

Barite

{011}, {101}, modified

Barite

{001}, {210}, modified

Barite

Tabular {001}

Barite

{001}, {210}, modified

Barytocalcite

{100}, {111}, {001}

Barytocalcite

Short prismatic [101]

Becquerelite

{011}, {111}

Becquerelite

Elongated [010]

Benitoite

{102}, {001}, modified

Benitoite

{012}, modified

Bertrandite

Tabular {001}

Bertrandite

Tabular {001}

Bertrandite

Contact twin on {021}

Beryl

{100}, {101}, {112}

Beryl

{100}, {001}

Beryl

{100}, {001}, modified

Beryl

{100}, {001}, modified

Beryl

{100}, {001}, highly modified

Beryl

Tabular {001}

Beryllonite

Tabular {010}, higly modified

Berzeliite

{211}, modified

Beudantite

{102}, modified

Beudantite

{102}, modified

Beudantite

{021}, modified

Bieberite

{111}, {101}, modified

Biotite

{001}, {010}, {331}

Bischofite

{100}, {110}, {111}, modified

Bischofite

{110}, {201}, {111}

Bismuthinite

{110}, {010}, {310}, modified

Bismuthinite

{110}, {010}, modified

Bismuthinite

{110}, {010}, {311}, modified

Bismutotantalite

{130}, {111}, modified

Bixbyite

{100}, {211}

Bixbyite

{100}, modified by {211}

Blödite

{110}, {001}, modified

Blödite

{111}, {110}, {011}, highly modified

Boleite

With epitaxial overgrowths of pseudoboleite

Boracite

{100}, modified

Boracite

{110}, modified

Boracite

{111}, modified

Borax

{100}, {010}, {001}, modified

Borax

Contact twin on {100}

Borax

{100}, {110}, {010}, {001}, modified

Bornite

{100}

Bornite

{111}, {100}

Bornite

Penetration twin on [111]

Bornite

{110}

Bournonite

Tabular {001}

Bournonite

Repeated contact twin on {110}

Bournonite

Contact twin on {110}

Bournonite

Tabular {001}

Braunite

{112}, {211}

Braunite

{112}, modified

Braunite

{112}, highly modified

Braunite

{100}, {213}, modified

Braunite

Contact twin on {102}

Brazilianite

{011}, {111}

Breithauptite

Tabular {001}

Bromellite

{100}, {101}, {001}

Brookite

Tabular {010}

Brookite

Prismatic {120}, modified

Brookite

{140}, {111}, modified

Brookite

{111}, {120}

Brookite

Tabular {010}

Brucite

{101}, {001}, {201}

Brucite

{001}, {110}

Calciohilairite

{110}, {120}, {102}

Calcite

{101}

Calcite

{021}

Calcite

{211}

Calcite

{021}, {101}

Calcite

{100}, {101}

Calcite

{401}, {211}

Calcite

{100}, {331}, {001}

Calcite

{401}, modified

Calcite

Contact twin on {001}

Calcite

{100}, {101}, {045}

Calcite

Contact twin on {001}

Calcite

Contact twin on {001}

Calcite

Parallel growth of flat rombohedra

Calcite

{021}, modified

Calcite

{401}, modified

Calcite

{100}, {101}, modified

Calcite

{2131}, modified

Calcite

{021}, {100}, modified

Calcite

{101}, modified

Calcite

{101}, modified

Calcite

{532}, modified

Calcite

{214}, {110}, modified

Calcite

Contact twin on {001}

Calcite

{401}, {725}, modified

Calcite

{581}, {101}, modified

Calcite

Contact twin on {101}

Calcite

Contact twin on {101}

Calcite

Contact twin on {021}

Calcite

Contact twin on {012}

Calcite

Contact twin on {001}

Calcite

{211}, {012}

Calcite

{413}, {100}, {012}

Calcite

{413}, {100}, {012}, contact twin on {001}

Calcite

{012}, {100}

Calcite

Contact twin on {001}, triangular habit due to underdevelopment of prism faces

Calcite

{413}, {100}, {012}, contact twin on {001}

Calcite

{413}, {081}, modified, contact twin on {001}

Calcite

{012}, {283}, contact twin on {001}

Calcite

{101}, {021}

Calcite

Contact twin on {012}

Calcite

{2131}, {0112}

Calcite

Contact twin on {1011}

Calcite

Contact twin on {0001}, contact plane {1010}

Calcite

Contact twin on {0001}, contact plane {1010}

Caledonite

{010}, {100}, {101}

Caledonite

Prismatic [001]

Calomel

Prismatic {110}

Calomel

{118}, {111}, modified

Calomel

Contact twin on {112}

Calomel

{110}, {013}, modified

Carnallite

Equant

Carnallite

Tabular {001}

Cassiterite

{110}, {111}, modified

Cassiterite

{110}, {111}, modified

Cassiterite

Contact twin on {101}

Cassiterite

Repeated contact twin on {101}

Cassiterite

Repeated contact twin on {101}

Cassiterite

Repeated contact twin on {101}

Cassiterite

{111}, {011}

Cassiterite

{676}, modified

Catapleiite

{100}, {001}

Catapleiite

Tabular {001}

Catapleiite

Tabular {001}

Catapleiite

Tabular {001}

Catapleiite

{001}, {103}

Cavansite

{111}, {101}

Celestine

Prismatic {011}, {210}, modified

Cerussite

Tabular {010}

Cerussite

{010}, {021}, {012}, {110}, {111}

Cerussite

Repeated penetration twin on {110}

Cerussite

Tabular {100}

Cerussite

Contact twin on {110}

Cerussite

Prismatic [100], highly modified

Cerussite

Pseudohexagonal {111}, {021}

Chabazite

{101}

Chalcocite

Tabular {001}, modified

Chalcocite

Penetration twin on {032}

Chalcocite

Multiple twin on {110}

Chalcocyanite

{010}, {110}, {011}, modified

Chalcophyllite

Tabular {001}

Chalcopyrite

Lamellar contact twin on {112} by {112}

Chalcopyrite

{112} modified by {112}

Chalcopyrite

{112} + {112}, modified

Chalcopyrite

Contact twin on {112} by {112}

Chalcosiderite

{110}, {010}, {001}, {111}, modified

Chalcostibite

Tabular {100}

Chalcostibite

Tabular {010}, {061}, {110}

Chalcostibite

Tabular {010}

Childrenite

{110}, {100}, {121}, {121}, modified

Childrenite

{110}, {100}, {131}, {131}, {121}, {121}

Chondrodite

{011}, {221}, {223}

Chondrodite

Highly modified crystal

Chromite

{111}

Chromite

{110}

Chrysoberyl

Contact twin on {130}

Chrysoberyl

Repeated penetration twin on {130}

Chrysoberyl

Tabular {001}

Cinnabar

{100}, {001}, {045}, {025}

Cinnabar

{011}

Cinnabar

{205}, {100}

Cinnabar

{101}, {508}, {001}, modified

Cinnabar

{102}, modified, penetration twin on {001}

Claudetite

{010}, {110}, {111}, {101}

Claudetite

Tabular {010}

Clinochlore

{101}, {100}, {001}

Clinohedrite

Clinohumite

Highly modified crystal

Cobaltite

{100}, {210}

Cobaltite

{111}, {210}

Colemanite

{110}, {011}, {221}, {111}, highly modified

Colemanite

Short prismatic [001], highly modified

Columbite

Tabular {010}, modified

Columbite

{010}, {111}, {110}, modified

Columbite

Equant

Colusite

{210}, {111}, {110), modified

Copper

{111}

Copper

{100}

Copper

{100}, modified

Copper

Contact twin on {111}

Copper

{100}, modified

Cordierite

{110}, {130}, {001}, modified

Cordierite

Prismatic [001], modified

Cordylite-(Ce)

Prismatic {100}

Cordylite-(Ce)

Parallel growth of dipyramidal crystals

Cordylite-(Ce)

{101}, {001}, modified

Corundum

Several dipyramids {hhl}

Corundum

{773}, {111}, {001}, modified

Corundum

{101}, {001}, modified

Corundum

{100}, {001}, modified

Corundum

Tabular {001}

Corundum

{111}

Corundum

Contact twin on {102}, flattened crystals

Cosalite

{100}, {010}, {301}, modified

Cotunnite

Prismatic [001]

Cotunnite

Tabular {010}

Covellite

Tabular {001}

Creedite

Prismatic {110}

Cristobalite

{111}

Crocoite

{110}, {401}, {111}

Crocoite

{110}, {111}, {111}, modified

Cryolite

{111}, {001}, modified

Cryolite

{110}, {001}, modified

Cryolithionite

{110}

Cryolithionite

{110}, {211}

Cubanite

{110}, {010}, {101}, modified

Cubanite

{100}, {110}, {001}, {011}, modified

Cuprite

{111}

Cuprite

{110}

Cuprite

{111}, {321}

Cuprite

{100}, {111}, gyroid 968

Cuprite

Cubic

Curite

Prismatic [001]

Danburite

{110}, {201}

Descloizite

{111}, {001}, modified

Descloizite

{111}, modified

Diaboleite

Tabular [001]

Diaboleite

Diamond

{111}

Diamond

{100}

Diamond

{133}

Diamond

Contact twin on {111}

Diaspore

Tabular {010}

Diaspore

Tabular {010}

Diaspore

Tabular {010}

Diaspore

Prismatic {021}

Diaspore

{140}, {131}, modified

Diaspore

Thick tabular {010}

Diaspore

Thick tabular {010}

Diopside

{100}, {010}, {001}, {221}, modified

Dioptase

Prismatic {110}, {201}

Dioptase

{110}, {201}

Dolomite

{401}, modified

Dolomite

{101}

Dolomite

Contact twin on {100}

Dolomite

{101}, modified

Dolomite

{401}, modified

Dolomite

Contact twin on {001}

Dufrenoysite

Prismatic [100], flattened {010}

Dyscrasite

{111}, {021}

Eglestonite

{110}, modified

Eglestonite

{110}, modified

Elpidite

Prismatic [001]

Elpidite

Prismatic [001]

Enargite

Short prismatic [001]

Enargite

Tabular {001}

Enargite

{110}, {001}, modified

Enstatite

Short prismatic [001]

Enstatite

Long prismatic [001]

Epididymite

Reticulated twin on {110}

Epididymite

Long prismatic {011}

Epididymite

Tabular {001}, elongated [100]

Epidote

Prismatic [010]

Epidote

Prismatic [010]

Epidote

Pseudo-octahedral

Epidote

Pseudo-octahedral

Epidote

Pseudo-hexagonal tablet

Epistilbite

Mimetic twin on {100}

Epistilbite

Mimetic twin on {110}

Epistilbite

Mimetic twin on {100}

Epistilbite

{110}, {001}, modified

Epsomite

{110}, {111}, modified

Epsomite

{110}, {111}

Erythrosiderite

Tabular {100}

Ettringite

Dipyramidal {1012}

Euclase

Prismatic [100]

Euclase

{031}, {100}, modified

Euclase

prismatic {031}, modified

Eudialyte

Tabular {001}

Eudialyte

{101}, {001}, modified

Eudidymite

Tabular {001}, highly modified

Euxenite-(Y)

Tabular {010}, elongated [001]

Euxenite-(Y)

{100}, {010}, {111}, modified

Fergusonite

{230}, {111}, {001}

Fergusonite

{231}, {111}, {001}, {230}

Ferrotapiolite

Contact twin on {013}, distorted by elongation on [013]

Ferrotapiolite

{113}, {001}, {100}, {110}

Fiedlerite

Tabular {100},

Fiedlerite

Tabular {100},

Fluellite

Dipyramidal {111}

Fluocerite-(Ce)

{110}, {001}, modified

Fluorite

{100}

Fluorite

{111}

Fluorite

{110}

Fluorite

{100}, modified by {421}

Fluorite

{100}, highly modified

Fluorite

{110}, {221}, {111}

Fluorite

{100}, {310}, {311}

Fluorite

{111}, {221}

Fluorite

Penetration twin on [111]

Fluorite

Penetration twin on [111]

Franckeite

Tabular {010}, elongated [001]

Freieslebenite

{110}, {120}, {011}, {031}, modified

Freieslebenite

Contact twin on {100}

Fülöppite

Tabular {001}

Fülöppite

{100}, {112}, modified

Gadolinite

{011}, {111}, {111}, {001}, modified

Galena

{100}

Galena

{100}, {111}

Galena

{111}

Galena

{100}, {221}

Galena

Contact twin on {111}

Galena

{441}, {221}

Galena

{100}, {111}, {110}, modified

Galena

Penetration twin on [111]

Galena

Pseudohexagonal tabular contact twin on {111}

Galenobismutite

Tabular {100}

Garnet

{110}

Garnet

{211}

Garnet

{110}, {211}

Garnet

{110}, modified

Garnet

{211}, modified

Gaylussite

{011}, {112}, modified

Gaylussite

{110}, {011}, modified

Geocronite

Contact twin on {110}

Geocronite

{001}, {225}, {011}

Georgiadesite

{110}, {010}, {011}, modified

Gersdorffite

{111}, modified

Gersdorffite

{100}, {120}, {110}

Gismondine

{232}, multiple contact twin on the normal to {100} and composition planes approx. (100) and (001)

Glauberite

Prismatic {111}

Glauberite

Tabular {001}

Glaucodot

{110}, {021}

Glaucodot

{011}, {110}, {021}, modified

Gmelinite

{101}, {100}, {001}

Goethite

{110}, {010}, {121}, modified

Goethite

Prismatic {110}

Goethite

Gold

{111}

Gold

{100}

Gold

{100}, {111}

Gold

{210}

Gold

Contact twin on {111}

Gold

Contact twin on {111}

Goldichite

{100}, {110}, {011},

Graphite

Tabular {001}

Graphite

Dipyramidal {101}

Graphite

{101}, {001}

Graphite

{101}, {001}, modified

Gratonite

{110}, {021}

Greenockite

{100}, {001}, {001}, modified

Gudmundite

Prismatic {230}

Gypsum

{010}, {120}, {011}

Gypsum

Contact twin on {100}

Gypsum

{010}, {011}, {102}, prisms {hk0}

Gypsum

Contact twin on {001}

Gypsum

Penetration twin on {001}

Halite

{100}

Hanksite

{110}, {113}, {001}

Hanksite

{110}, {113}, {001}, {223}

Hauerite

{111}, modified

Hauerite

{100}, {111}

Hausmannite

Contact twin on {112}

Hausmannite

Fiveling contact twin on {112}

Hausmannite

{101}, modified

Hausmannite

{101}, modified

Hauyne

{110}, {100}

Hematite

{001}, {102}

Hematite

{0.1.10}, {102}, {113}, modified

Hematite

{102}, {108}, {113}, modified

Hematite

{102}, {001}

Hematite

Contact twin on {0001}, contact plane {1010}

Hemimorphite

{010}, {110}, {011}

Hemimorphite

Contact twin on {001}

Hemimorphite

Tabular {010}

Hemimorphite

{010}, {100}, {031}, {121}, modified

Herderite

{101}, {122}, {011}, {001}, modified

Herderite

Prismatic [100], highly modified

Heulandite

{010}, {001}, {201}, modified

Heulandite

{010}, {001}, {201}, modified

Hutchinsonite

Prismatic [001]

Hydrochlorborite

Tabular {001}

Ianthinite

Prismatic [010]

Ice

Prismatic {100}. Typical for high elevations and low temperatures

Ice

Tabular {001}. Typical for severe frost

Ilmenite

{102}, {113}, {001}

Ilmenite

{102}, {213}, {001}

Ilmenite

{102}, {001}, modified

Ilmenite

Tabular {001}

Ilvaite

Prismatic {110}, {011}

Ilvaite

Short prismatic c, {110}, {210}, {111}

Ilvaite

{100}, {011}, modified

Iodargyrite

{100}, {001}, {101}, modified

Jacobsite

{111}

Jacobsite

{111}, modified

Jadeite

Tabular {100}

Jadeite

Prismatic {110}

Jurbanite

{110}, {011}

Kaersutite

{010}, {110}, {011}, modified

Kaersutite

{011}, {010}, {110}, modified

Kaersutite

{110}, {010}, {011}, modified

Kaersutite

Contact twin on {100}

Kaersutite

{110}, {010}, {011}, modified

Kaersutite

Prismatic [001], with epitaxial augite

Kainite

{001}, {111}, {111}, modified

Kainite

{111}, {111}, modified

Kleinite

Prismatic {1010}

Krennerite

Short prismatic [001]

Kyanite

tabular {100}

Langite

{100}, {010}, {011}

Langite

Contact twin on {011}

Langite

Repeated penetration twin on {011}

Lansfordite

{100}, {110}, {001}, modified

Lanthanite

Tabular {010}

Laumontite

{110}, {101}, modified

Laurionite

Tabular {010}, elongated [001]

Laurionite

Tabular {010}, elongated [001]

Laurionite

{100, {010}, dipyramids {1k1}

Laurionite

{010}, {110}, {281}

Laurionite

{010}, {120}, {011}, modified

Laurionite

{010}, {110}, {011}

Lautite

{010}, {340}, modified

Lazulite

{111}, {011}, modified

Lazulite

{111}, {011}, modified

Lead

{111}

Lead

{551}, modified

Leadhillite

Tabular {001}

Leadhillite

Tabular {001}

Lepidocrocite

Tabular {010}

Leucite

{211}

Leucite

{211}, {110}

Leucophanite

{110}, {001}, modified

Leucosphenite

{311}, {010}, {001}, modified

Leucosphenite

{311}, {010}, {001}, modified

Leucosphenite

Contact twin on {001}

Libethenite

{110}, {011}, {111}

Libethenite

{011}, {110}, modified

Libethenite

{011}, {110}

Linarite

Contact twin on {100}

Linarite

Prismatic [010], highly modified

Lindgrenite

Tabular {010}

Liroconite

{110}, {011}

Liroconite

Contact twin on {100}

Livingstonite

Prismatic [010]

Löllingite

Prismatic {110}

Löllingite

{110}, {101}, {011}, modified

Löllingite

Prismatic {011}

Lorandite

{110}, {201}, {201}, modified

Lorandite

Equant crystal

Lorenzenite

Prismatic [010]

Lorenzenite

Prismatic [010]

Lorenzenite

Prismatic [010]

Magnesite

{101}

Magnesite

{101}, modified

Magnesite

Short prismatic {110}

Magnetite

{100}

Magnetite

{111} modified by {110}

Magnetite

Spinel law twin

Magnetite

{111}, {432}, modified by {654}

Magnetite

{100}, {111}, {110}, modified

Magnetite

{111}, highly modified

Malachite

Contact twin on {100}

Malachite

Contact twin on {100}

Manganite

Contact twin on {012}

Manganite

Prismatic {110}

Manganite

Elongated [001]

Marcasite

{010}, {101}, {110}, modified

Marcasite

Contact twin on {101}

Marcasite

Fourling twin on {101}

Marcasite

Repeated twin on {101}

Marshite

Tetrahedral

Matlockite

Tabular {001}

Melanophlogite

{100},

Mellite

{101}, {110}, {001}

Meneghinite

Tabular {100}, elongated [001]

Metacinnabar

{211}, modified

Meyerhofferite

{100}, {101}, {111}

Miargyrite

{100}, {010}, {001}, modified

Miargyrite

equant crystal

Microcline

Manebach twin

Microlite

{111}

Microlite

{111}, {100}

Milarite

{110}, {102}, modified

Millerite

prismatic {100}

Mirabilite

Short prismatic [001]

Molybdenite

Thick tabular {001}

Molybdenite

Tabular {001}

Molybdite

{010}, {111}, {100}

Molybdite

{010}, {111}, {100}, {001}

Monazite

Isometric, highly modified

Monazite

{100}, {010}, {101}, {011}, modified

Monazite

{111}, {100}, modified

Montroydite

Elongated [010], highly modified

Montroydite

{011}, {120}, highly modified

Moschellandsbergite

{110}, modified

Moschellandsbergite

{110}, modified

Muscovite

Tabular {001}

Muscovite

{001}, {010}, {221}

Nagyagite

{001}, {101}, {011}, modified

Nagyagite

Tabular {001}

Nahcolite

Prismatic {110}

Narsarsukite

Tabular {001}

Narsarsukite

Tabular {001}

Narsarsukite

Tabular {001}

Natrolite

{110}, {111}, {111}

Nepheline

{100}, {001}, {001}, modified

Neptunite

{110}, {001}, highly modified

Neptunite

{110}, {001}, modified

Neptunite

Contact twin on {001}

Neptunite

Long prismatic {110}

Nesquehonite

Short prismatic [001]

Nickeline

Prismatic {110}

Nickeline

{100}, {101}, {001}

Nizamoffite

Elongated [001]

Olivenite

{011}, {110}

Olivenite

{011}, {100}, modified

Olivine

{010}, {021}, {110}, modified

Olivine

{100}, {010}, {021}, modified

Olmsteadite

Tabular {001}

Olmsteadite

Tabular {100}

Ordoñezite

{011}, {001}, {100}

Orpiment

{301}, {210}, {010}, modified

Orpiment

{210}, prisms {hk-l}, modified

Orpiment

Tabular {010}

Orthoclase

{110}, {101}

Orthoclase

{110}, {001}, {101}, modified

Orthoclase

{110}, {010}, {001}, {201}, modified

Orthoclase

Karlsbad law twin (left)

Orthoclase

Karlsbad law twin (right)

Orthoclase

Tabular {010}

Orthoclase

{110}, {201}, {001}

Orthoclase

Multiple Manebach- and Baveno law twin

Orthoclase

Multiple Baveno law twin

Orthoclase

Baveno law twin

Orthoclase

Tabular {010}

Orthoclase

Manebach law twin

Orthoclase

{001}, {010}, {110}, {111}, modified

Pachnolite

Contact twin on {100}

Pachnolite

Contact twin on {100}

Pachnolite

Prismatic {110}

Papagoite

{110}, {001}, {100}, {401}

Paralaurionite

Contact twin on {100}

Paralaurionite

Contact twin on {100}

Paramelaconite

Prismatic {100}

Pararammelsbergite

Tabular {001}

Paratacamite

Contact twin on {1011}

Paulingite

{110}

Pearceite

Tabular {001}

Penfieldite

Prismatic {100}

Penfieldite

{11.0.2}, {001}

Pentagonite

{110}, {201}, {001}

Pentagonite

Fivefold contact twin on {110}

Perovskite

{100}

Perovskite

{100}, modified

Pharmacosiderite

{100}, {111}

Pharmacosiderite

{100}

Phenakite

{011}, {113}, {101}, modified

Phenakite

Prismatic {110}, {101}, modified

Phillipsite

Mimetic twin {001}

Phillipsite

Sixling twin: mimetic {001}, penetration {110}

Phillipsite

Sixling twin: mimetic {001}, penetration {110}

Phillipsite

Sixling twin: mimetic {001}, penetration {110}

Phlogopite

Mica law twin

Phlogopite

Mica law twin

Phlogopite

Mica law twin

Phosgenite

{100}, {110}, {001}, modified

Phosgenite

{100}, {110}, {001}, modified

Phosgenite

{100}, {010}, {001}, modified

Phosgenite

{110}, {001}, modified

Pirssonite

Tabular {010}

Pirssonite

Prismatic {110}

Plagionite

Tabular {001}

Polybasite

Tabular {001}

Polybasite

Tabular {001}

Polybasite

Tabular {001}

Polybasite

Tabular {001}

Polycrase-(Y)

Tabular {010}

Polycrase-(Y)

{111}, modified

Potassiumalum

{100}, {111}, {110}

Potassiumalum

{111}

Potassiumalum

{111}, {110}, {100}

Prosopite

Tabular {010}

Proustite

{110}, {101}, modified

Pseudoboleite

Epitaxial on boleite

Pseudobrookite

Tabular {100},

Pseudobrookite

Tabular {100}, elongated [001]

Pseudobrookite

Elongated [001]

Pseudobrookite

{100}, {210}, {101}

Pyrargyrite

{110}, {101}, modified

Pyrite

{100}

Pyrite

{111}

Pyrite

{210}

Pyrite

{210}, {111}

Pyrite

{111}, modified by {210}

Pyrite

penetration twin [110] (iron cross twin)

Pyrite

{321}, modified

Pyrite

{100}, {110}, modified

Pyrite

{100}, {210}, {211}, modified

Pyrite

{100}, highly modified

Pyrite

{111}, highly modified

Pyrochroite

Prismatic {1010}

Pyrochroite

{1012}, modified

Pyrolusite

Prismatic [001]

Pyrolusite

Prismatic {110}, {011}, {321}

Pyromorphite

{100}, {001}, modified

Pyromorphite

{100}, {001}, modified

Pyromorphite

{100}, {101}, modified

Pyrrhotite

{100}, {010}, modified

Pyrrhotite

{101}, {001}

Pyrrhotite

{100}, {001}

Pyrrhotite

Contact twin on {1012}

Quartz

{101}, {011}

Quartz

{100}, {101}, {011}

Quartz

Left-handed Dauphiné twin (mimetic twin on [001])

Quartz

{100}, {101}, {011}, modified

Quartz

Right-handed Dauphiné twin (mimetic twin on [001])

Quartz

{101}, modified

Quartz

{100}, {101}, {011}, {511}

Quartz

Japanese twin of two flattened crystals

Quartz

Japan law twin (Contact twin on {112})

Quartz

{100}, {210}, {101}, modified

Quartz

{100}, {611}, {101}, modified

Quartz

Common habit, {100}, {101}, {011}

Quenselite

Tabular {010}, elongated [001]

Raspite

{100}, {001}, {011}, modified

Raspite

Contact twin on {100}

Raspite

{100}, {001}, {011}, modified

Realgar

{110}, {101}, modified

Realgar

Highly modified

Reddingite

{111}, {{212}, {010}

Reddingite

{111}, modified

Reedmergnerite

{100}, {110], {001}, modified

Rhodochrosite

{101}

Rhodochrosite

{101}, {110}

Rhodochrosite

{321}, {211}

Rhodochrosite

{321}, {211}, {001}

Rhodonite

{100}, {010}, {001}, modified

Rhodonite

Tabular {110}, modified

Rivadavite

Elongated [010], tabular {100}

Romeite

{111}, {100}

Romeite

{111}, modified

Roselite

Thick tabular {102}

Rosickyite

Tabular {010}, elongated [001]

Rutile

{110}, {111}, modified

Rutile

{101}, {310}, {210}, {110}

Rutile

Sixling twin on {101}

Rutile

Sixling twin on {101}

Rutile

Eightling twin on {101}

Rutile

Long prismatic [001]

Rutile

Eightling twin on {101}

Rutile

Contact twin on {301}

Rutile

Contact twin on {101}

Safflorite

{110}, {011}, modified

Sal Ammoniac

{211}, modified

Sal Ammoniac

{211}, {578}, gyroidal

Sal Ammoniac

Penetration twin on {111}

Saléeite

Thick tabular {001}

Samarskite-(Y)

Samarskite-(Y)

{010}, {100}, {101}, {130}

Samsonite

Short prismatic {110}

Scapolite

{100}, {101}, modified

Scapolite

{110}, {211}, {100}, {101}, modified

Scheelite

{101}, modified

Schoepite

{100}, {010}, {001}, modified

Scorodite

{111}, modified

Scorodite

{111}, {100}, {010}, modified

Selenium

{100}, {101}

Seligmannite

Thick tabular {001}

Sellaite

Short prismatic, modified

Shortite

{100}, {011}, {001}

Siderite

{012}, {001}

Siderite

{101}

Siderite

{051}, {101}, modified

Siderite

Short prismatic {100}

Siderite

{211}, modified

Silver

{111}

Silver

{100}

Silver

Contact twin on {111}

Skutterudite

{111}, {100}, modified

Smithite

{100}, {101}, {001}, modified

Smithsonite

{401}, modified

Smithsonite

{021}, modified

Smithsonite

{100}, {211}, modified

Smithsonite

{101}, {012}

Sperrylite

{111}, Modified

Sperrylite

{100}, {111}, {210}

Sphalerite

{110}

Sphalerite

{111}

Sphalerite

{111}, modified

Sphalerite

Twin on [111], contact plane {111}

Sphalerite

{111}, {211}

Sphalerite

{111}, modified

Sphalerite

Twin on [111], contact plane {111}

Sphalerite

{111}, {111}, {100}, {110}, modified

Sphalerite

Twin on [111], contact plane {111}

Sphalerite

{111}, {111}, modified

Spinel

{111}

Spinel

Contact twin on {111}

Spinel

{111}, highly modified

Spinel

Modified octahedron

Spodumene

{110}, {221}, {010}, modified

Stannite

{001}, {110}, {102}, modified

Staurolite

{110}, {010}, {001}, modified

Staurolite

Penetration twin on {031} and {231}

Staurolite

Penetration twin on {031}

Staurolite

Penetration twin on {231}

Stephanite

Tabular {001}, modified

Stephanite

{001}, {111}, modified

Sternbergite

Tabular {001}

Sternbergite

Contact twin on {130}

Stibiotantalite

{110}, {101}, modified

Stibnite

{110}, {331}

Stibnite

{110}, {331}, modified

Stibnite

{110}, {331}, modified

Stibnite

{110}, {331}, modified

Stibnite

{110}, {331}, {010}, modified

Stibnite

{110}, {341}, {010}, modified

Stibnite

{110}, {12.18.1}, modified

Stilbite

Mimetic twin on {001}

Stilbite

Mimetic twin on {001}

Stolzite

{100}, {201}, {101}, modified

Stolzite

{112}, {001}, modified

Strengite

{001}, {111}, {201}

Strengite

{210}, {111}

Stringhamite

{101}, {011}, modified

Strontianite

{110}, {010}, {001}, modified

Strontianite

{110}, {010}, {011}, modified

Strontianite

Highly modified

Struvite

{110}, {011}, {001}, modified

Struvite

{101}, {001}, {010}, modified

Sulfur

{111}

Sulfur

{111}, modified

Sulfur

Highly modified crystal

Sulfur

{111}, {001}

Sylvanite

{100}, {010}, {101}, {103}, highly modified

Sylvanite

{100}, {010}, {101}, highly modified

Tantalite

{170}, {001}, modified

Teallite

Tabular {010}

Tellurite

Tabular {010}

Tellurium

{012}

Tellurium

prismatic [001]

Tennantite

{100}, modified

Tenorite

{100}, {111}, {001}, modified

Tenorite

Tabular {001}

Terlinguaite

Highly modified

Tetradymite

{012}, {001}, {101}

Tetrahedrite

{211}, {100}, modified

Tetrahedrite

{111}, modified

Tetrahedrite

{211}

Tetrahedrite

{111}, modified

Tetrahedrite

{111}, {110}

Tetrahedrite

Penetration twin on [111]

Thomsenolite

{110}, {111}, {001}

Thomsenolite

{110}, {001}, {111}

Tincalconite

{1011}, {0001}

Tincalconite

{1011}, {0001}, {0112}

Titanite

{111}, {001}, modified

Titanite

{111}, {011}

Topaz

{100}, {021}, {110}, modified

Topaz

{110}, {120}, {021}, {111}, highly modified

Topaz

{120}, {001}, {011}, modified

Torbernite

Thick tabular {001}

Torbernite

Tabular {001}

Torbernite

Tabular {001}

Tourmaline

{100}, {110}, {011}, {101}, modified

Tourmaline

Prisms {hk0}, {010}, {001}

Tridymite

Penetration twin on {304}

Trona

{100}, {001}, {111}

Trona

{001}, {100}, {111}

Trona

{100}, {001}, {111}, modified

Tschernichite

{302}, {001}

Tschernichite

Contact twin on {101}

Tschernichite

Contact twin on {302}

Tschernichite

Contact twin on {304}

Tschernichite

Multiple contact twin on {101}

Turquoise

{010}, {110}, {001}, modified

Ullmannite

Multiple twin on [110], contact plane {001}

Valentinite

{100}, {110}, {122}, modified

Valentinite

Tabular {010}

Vanadinite

{100}, {101}, modified

Vanadinite

{100}, {101}, modified

Vanadinite

{100}, {110}, {101}, modified

Vesuvianite

Short prismatic

Vesuvianite

Long prismatic

Vesuvianite

{100}, {101}, modified

Vesuvianite

{100}, {101}, highly modified

Vesuvianite

{101}, {001}

Vesuvianite

{101}, {001}, {112}

Vesuvianite

{101}, modified

Vivianite

Tabular {010}, {211}

Vivianite

Prismatic [001], modified

Vivianite

Prismatic [001], highly modified

Vrbaite

Tabular {010}

Vrbaite

Dipyramidal {111}

Vuagnatite

Prismatic {110}

Wavellite

{110}, {111}

Wavellite

{110}, {121}, {100}

Wavellite

{110}, {101}, {010}, modified

Wendwilsonite

{011}, {111}, modified

Whewellite

{110}, {011}, {101}

Willemite

{110}, {121}, modified

Witherite

{110}, {021}, {010}

Witherite

{110}, {010}, several prisms {0kl}

Witherite

{110}, {010}, {111}, {021}, {011}

Witherite

Mimetic twin on {110}

Witherite

Mimetic twin on {110}

Wöhlerite

Tabular {100}

Wolframite

{100}, {110}, {001}, modified

Wolframite

{100}, {010}, {102}, modified

Wollastonite

Tabular {100}

Wollastonite

{010}, {540}, {100} modified

Wulfenite

Tabular {001}

Wulfenite

{201}

Wulfenite

Thick tabular {001}

Wulfenite

{001}, {34.75.}, {114}, {013}

Wulfenite

Tabular {001}

Wulfenite

{112}, {112}, {001}, modified

Wulfenite

{110}, {001}, {001}, overgrown with small pyramidal crystals

Wulfenite

Contact twin on {001}

Wurtzite

{101}, {001}

Xenotime

{100}, {101}

Xenotime

{100}, {101}, modified

Yttrotantalite-(Y)

Equant

Zincite

{101}, {001}, {100}

Zincite

Pyramidal

Zinkenite

Prismatic {110}

Zircon

{110}, {101}

Zircon

{100}, {110}, {101}, {112}

Zircon

Epitaxial intergrowth with Xenotime-(Y)

Zircon

{101}, {100}

Zircon

{101}, {301}

Zircon

{101}, {110}

Zircon

{110}, {101}, modified

Zircon

{100}, {301}, {101}

Zirconolite

Elongated [001]

Zirconolite

Equant

Zoisite

Short prismatic b

Zoisite

Short prismatic b