Abelsonite

Comments: Purplish red crystal fragment of abelsonite.
Location: Green River formation, Uintah County, Utah, USA. Scale: Crystal size 1.8 mm.
© Thomas Witzke / Abraxas-Verlag

Abernathyite

Comments: Clear, yellow, crystalline abernathyite crystal group.
Location: Temple Mountain, Every County, Utah, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Abhurite

Comments: Pearly translucent pale yellow crystalline abhurite.
Location: Shipwreck off Hidra, Vest-Agder, Norway. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Acanthite

Comments: Pseudo cubic acanthite crystals on matrix.
Location: Rayas mine, Guanajuato, Mexico. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Acanthite   Argentite

Comments: Dark metallic acanthite crystals up to 3 mm. Most of the crystals are a cubic habit, so the acanthite is pseudomorphing the original argentite.
Location: San Juan de Rayas Mine (Rayas Mine), Guanajuato, Mun. de Guanajuato, Guanajuato, Mexico. Scale: 18x12x12 mm.
© John Betts - Fine Minerals

Acetamide

Comments: White crystalline crust of acetamide on black shale.
Location: Shamokin, Northumberland County, Pennsylvania, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Actinolite

Comments: Sharp, floater actinolite crystal with a slight green tint.
Location: Namibian dessert, more or less due West of Uis, Namibia. Scale: 8.5 x 2.5 x 2 cm.
© Fabre Minerals

Adamite

Comments: Sprays of adamite with intense color and well defined crystals which stand out from the matrix.
Location: Ojuela mine, Mapimi, Durango, Mexico. Scale: 5 x 5 cm.
© Fabre Minerals

Adamite   Cryptomelane

Comments: Black, rounded balls of cryptomelane and purple, transparent adamite.
Location: Ojuela mine, Mapimi, Druango, Mexico. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Adamsite-(Y)

Comments: Sprays of adamsite-(Y) crystals on matrix.
Location: Mt. St. Hilaire, Quebec, Canada. Scale: 1.5 cm.
© John Veevaert

Aegirine

Comments: Fully-terminated, prismatic crystal of aegirine.
Location: Khibiny Massif, Kola Peninsula, Russia. Scale: Crystal size 2.8 cm.
© John Veevaert

Aegirine   Catapleiite

Comments: Clear crystals of catapleiite with an attached 1.8 cm prismatic crystal of dark aegirine.
Location: Mt. St. Hilaire, Quebec, Canada. Scale: 3.5 x 2.2 cm.
© John Veevaert

Aegirine   Henrymeyerite

Comments: A nearly black crystal of henrymeyerite with dark green prismatic crystals of aegirine in quartz.
Location: Green River formation, Uintah County, Utah, USA. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Aegirine   Lourenswalsite

Comments: Light brownish rosettes of lourenswalsite with dark green crystals of aegirine and white feldspar.
Location: Diamond Jo quarry, Magnet Cove, Hot Springs Co., Arkansas, USA. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Aegirine   Pectolite

Comments: White, cottony pectolite tufts with acicular aegirine.
Location: 3M quarry, Little Rock, Pulaski County, Arkansas, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Aegirine   Calcioburbankite

Comments: Tan crystal spray of calcioburbankite on dark green aegirine.
Location: Mont Saint Hilaire, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Aegirine   Manganotychite

Comments: Pale rose-tan granular manganotychite with black aegirine prism.
Location: Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Aegirine-augite   Dellaventuraite

Comments: View in plane-polarized light of reddish brown dellaventuraite (OPTK) as an overgrowth on purple-gray aegirine-augite (AE-AG) in a matrix of rounded quartz (QZ) with minor rounded (high relief) apatite grains. (AmMin 90:306).
Location: Kajlidongri manganese mine, Jhabua District, Madhya Pradesh, India. Scale: Picture size 2.5 cm.
© American Mineralogist

Aenigmatite

Comments: Dark, crystal prism of aenigmatite in white albite with astrophyllite.
Location: Mount Eveslogchorr, Khibiny Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Aerinite

Comments: Pale blue massive aerinite.
Location: Cripple Creek, Teller County, Colorado, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Aerugite

Comments: Small dark green crystals of aerugite.
Location: Johanngeorgenstadt, Erzgebirge, Saxony, Germany. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Aeschynite-(Y)

Comments: Square crystal of aeschynite-(Y) on a matrix of albite, quartz and muscovite.
Location: Val. Pellice, Piedmont, Italy. Scale: Crystal Size 1 mm.
© John Veevaert

Afghanite

Comments: Parallel grouping of three, terminated, blue, opaque afghanite crystals set in matrix.
Location: Sar-eSang, Badakhshan, Afghanistan. Scale: Crystal size 3 cm.
© Dan Weinrich

Afwillite

Comments: Crystallized afwillite prisms.
Location: Wessels Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: Crystal size 1.5 mm.
© John Veevaert

Agardite-(Ca)

Comments: Green, acicular sprays of agardite (agardite-Ca?) on matrix.
Location: Big Three mine, Silver Peak, Esmeralda County, Nevada, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Agardite-(Y)

Comments: Fibrous to fine acicular green micro crystals of agardite-(Y) (chlorotile) to 1mm.
Location: Clara mine, Wolfach, Schwarzwald, Baden-W?rttemberg, Germany. Scale: Picture size 0.5 cm.
© Tom Loomis / Dakota Matrix

Agrellite   Eudialyte

Comments: Tan agrellite grain, with red eudialyte.
Location: Kipiwa Complex, Villedieu, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Agrinierite

Comments: Golden yellow, transparent agrinierite crystals.
Location: Margnac mine, Compreignac, Haute-Vienne, France. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Aheylite

Comments: Colorless radiating spray of aheylite crystals.
Location: Huanuni, Bolivia. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Ahlfeldite

Comments: Green encrustations of ahlfeldite on matrix.
Location: Mina El Dragon, Potosi, Bolivia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Aikinite

Comments: Gray metallic prismatic crystals of aikinite and crystalline quartz.
Location: Mike Mine, San Juan County, Colorado, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Aikinite   Berryite

Comments: Fine-grained, gray, metallic granular berryite with silvery, metallic, prismatic aikinite.
Location: Mike Mine, San Juan County, Colorado. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ajoite

Comments: Bluish, bladed ajoite crystals.
Location: New Cornelia mine, Ajo, Pima County, Arizona, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Ajoite   Shattuckite

Comments: Dark blue, tabular crystals of shattuckite on light blue ajoite.
Location: New Cornelia mine, Ajo, Pima County, Arizona, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Ajoite

Comments: Aqua blue, long bladed crystals or ajoite on matrix.
Location: New Cornelia mine, Pima Co., Arizona, USA. Scale: Crystal size 0.75 mm.
© Tom Loomis / Dakota Matrix

Akaganeite

Comments: Rusty brown coating of akaganeite on rock.
Location: Wells, Elko County, Nevada, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Akatoreite   Rhodonite

Comments: Brown akatoreite in pink rhodonite.
Location: Akatore Creek, Eastern Otago Peninsula, South Island, New Zealand. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Akdalaite

Comments: Crystalline white akdalaite.
Location: Bulla Island, Caspian Sea, Kazakhstan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Akermanite

Comments: White translucent crystals akermanite.
Location: Lago de Vico, Viterbo, Lazio, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Akhtenskite

Comments: Dark gray grains of akhtenskite with brown superficial coating.
Location: Akhtenskoye Deposit, Chelyabinsk District, Urals, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Akimotoite

Comments: Electron micrograph of akimotoite (Ak) as columnar grains. Aggregates of akimotoite are adjacent to a large clinoenstatite grain (Cen) with (100) twin lamallae. (AmMin 84:268).
Location: Shock-metamorphosed Tenham chondrite. Scale: See Image.
© American Mineralogist

Akrochordite   Eveite

Comments: Micro crystals (to about 0.75mm) of very pale grayish green eveite in tiny vug with light pink akrochordite. Co-Type specimen & type locality.
Location: Langban, Varmland, Sweden. Scale: 13x10x4 mm.
© Tom Loomis / Dakota Matrix

Aktashite

Comments: Metallic gray grain of aktashite in quartz gangue.
Location: Moctezuma, Mun. de Moctezuma, Sonora, Mexico. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Alabandite

Comments: Dark gray stalactitic alabandite.
Location: Broken Hill Proprietary Mine, Broken Hill, New South Wales, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Alabandite   Daubreelite

Comments: Daubreelite (D), bright metallic white, with alabandite (A) (dull yellow) as inclusions in a polished section of an achondrite meteorite.
Location: Norton County, Kansas. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Alacranite

Comments: Red crystals of alacranite.
Location: Mine Wilmsdorfer Schacht, Possendorf near Dresden, Sachsen, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Alamosite

Comments: White alamosite crystal group. John Schneider Collection.
Location: Tsumeb, Namibia. Scale: 3.5x3x2 cm.
© Dan Weinrich

Albite   Plagioclase

Comments: Colorless, lustrous blocky albite crystals to 3 cm in size with a thick dusting of micaceous green micro chlorite.
Location: Acushnet Quarry, Bristol Co., Massachussetts, USA. Scale: 17 x 15 x 7.5 cm matrix.
© Dan Weinrich

Albite   Plagioclase

Comments: Crystal group of bladed albite (variety cleavelandite) crystals.
Location: Taquaral, Minas Gerais, Brazil. Scale: 7.4 x 5 cm.
© John Veevaert

Albite   Schorl

Comments: Several jet-black lustrous crystals of schorl perched on a white albite matrix.
Location: Shengus, Gilgit, Pakistan. Scale: 4 x 3 x 2 cm.
© Isaias Casanova / IC Minerals

Algodonite

Comments: Massive specimen of dark algodonite with vuggy areas filled with minute crystals.
Location: Algodones Mines, Coqu?mbo Province, Chile. Scale: 4x3x3 cm.
© John Betts - Fine Minerals

Algodonite   Koutekite

Comments: Silvery metallic koutekite with darker gray algodonite.
Location: Mohawk Mine, Keweenaw County, Michigan, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Aliettite

Comments: Tan to brownish pseudomorph of aliettite after wollastonite.
Location: Ingichka, Uzbekistan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Allabogdanite   Schreibersite

Comments: Relict grain of allabogdanite crystal (ABG) surrounded by schreibersite rim (SCHR) in plessite matrix (PL). Black phase is a secondary Fe-Ni-hydroxide. Backscattered electron image. (AmMin, 87:1249).
Location: Onello iron meteorite (high-Ni ataxite) Onello River basin, Aldan shield, Saha (Sakha) Republic (Yakutia), Eastern-Siberian Region, Russia. Scale: Scale bar 10 µ-m.
© American Mineralogist

Allactite

Comments: Brownish red allactite crystals.
Location: Sterling Hill, Ogdensburg, Sussex County, New Jersey, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Allanite-(Ce)

Comments: Dual views of the same 0.8 cm Jet black allanite-(Ce) on quartz.
Location: Tiro Estrella Mine, El Capitan Mts., Lincoln Co., New Mexico, USA. Scale: Crystal Size 0.8 cm.
© John Veevaert

Allanite-(La)

Comments: A single prismatic allanite-(La) crystal with small, lustrous black magnetite crystals, all on a matrix of hedenbergite.
Location: Mina Nueva Vizcaya, Sierra Gorda, Burguillos del Cerro, Badajoz, Spain. Scale: Crystal size 0.9 x 0.5 cm.
© Fabre Minerals

Allanite-(Y)

Comments: Dark brown allanite-(Y) in matrix.
Location: Boden, Marienberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 10 mm.
© Thomas Witzke / Abraxas-Verlag

Allargentum

Comments: Irregular crystalline aggregate grain of allargentum.
Location: Shaft 371, Schlema-Hartenstein area, Erzgebirge, Saxony, Germany. Scale: Specimen size 43 mm.
© Thomas Witzke / Abraxas-Verlag

Alleghanyite

Comments: Massive, brown alleghanyite with white calcite.
Location: Parker Shaft, Franklin, Sussex County, New Jersey. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Alleghanyite   Galaxite

Comments: Black granular galaxite with reddish alleghanyite and white kutnohorite.
Location: Bald Knob, Alleghany County, North Carolina, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Allophane

Comments: Blue, cuprian, botryoidal allophane on matrix.
Location: Reiche Zeche Mine, Himmelfahrt Mine, Freiberg, Freiberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Alluaudite

Comments: Nearly pure crystalline dark green brown mass of alluaudite.
Location: Warusenge Pegmatite, Buranga, Rwanda. Scale: Size Not Given.
© John Veevaert

Alluaudite   Heterosite

Comments: Purple crystalline heterosite with yellow coatings of alluaudite.
Location: Palermo Mine, North Groton, Grafton County, New Hampshire, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Almandine

Comments: Two reddish brown crystals of almandine on matrix.
Location: Fanny Gorge mine, Spruce Pine, Mitchell County, North Carolina, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Almandine   Hypersthene

Comments: Dark green blocky crystals hypersthene with reddish almandine.
Location: Barton Garnet Mine, North Creek, Warren County, Adirondacks, New York, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Alsakharovite-Zn

Comments: Light brown crystal fragment of alsakharovite-Zn.
Location: Lepkhe Nelm Mountain, Lovozero, Kola Peninsula, Russia. Scale: Crystal size 2 mm.
© Thomas Witzke / Abraxas-Verlag

Alstonite

Comments: Transparent alstonite crystals.
Location: Hexham, Northumberland, England. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Altaite

Comments: Bronze yellow metallic altaite crystals.
Location: Sonora, Tuolumne County, California, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Altaite   Mattagamite   Tellurantimony

Comments: Silvery metallic intergrowths of mattagamite with tellurantimony and altaite.
Location: Mattagami Lake Mine, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Altaite   Maslovite   Froodite

Comments: Reflected light photomicrograph of maslovite (M), froodite (F), and altaite (A), in chalcopyrite matrix.
Location: Oktyabr'skoye Mine, Norilsk, Krasnoyarsk Territory, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Althausite

Comments: Grayish to maroon colored and opaque crystals of althausite on matrix.
Location: Overntjern, Buskerud, Norway. Scale: 3.2 x 5 cm.
© John Veevaert

Aluminite

Comments: Snow-white, very pure nodules of aluminite.
Location: Newhaven, Sussex, Great Britain. Scale: 5.5 x 3 cm.
© John Veevaert

Aluminoceladonite   Muscovite

Comments: Large, 1cm, purple crystals of muscovite/leucophyllite, (var. alurgite which is an intermediate composition to muscovite and leucophyllite (aluminoceladonite).
Location: Ultevis, Sweden. Scale: 5x3.5x3cm.
© Tom Loomis / Dakota Matrix

Aluminocopiapite

Comments: Small yellow crystals of aluminocopiapite.
Location: Willi Agatz Mine, Dresden, Saxony, Germany. Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag

Aluminoferrotschermakite   Tuperssuatsiaite

Comments: Golden acicular tuperssuatsiaite crystal spray with clear apophyllite and dark green aluminoferrotschermigite.
Location: Aris Quarry, Khomas, Namibia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Aluminum

Comments: Native aluminum in a polished section.
Location: From a mud volcano in the Caspian Sea near Baku, Azerbaidzhan. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Alumohydrocalcite

Comments: Pinkish-white globular aggregates of alumohydrocalcite.
Location: Carriere de Richelle, Vise, Belgium. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Alumoklyuchevskite

Comments: Very small olive-greenish prismatic crystals of alumoklyuchevskite.
Location: Tolbachik volcano, Kamchatka, Russia. Scale: Sample size 1.8 x 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Alunite

Comments: Octahedral clear to tan tinted crystals of alunite.
Location: Marysvale, Piute County, Utah, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Alunogen   Jarosite

Comments: Colorless to white, tabular crystals alunogen on reddish jarosite.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Alunogen   Metavoltine

Comments: Yellow metavoltine with white alunogen.
Location: Carola Mine, Freital, near Dresden, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Alunogen   Voltaite

Comments: Dark greenish-black crystals of voltaite on white alunogen.
Location: Carola Mine, Freital, Dresden, Saxony, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Amarantite

Comments: Amber-like, long, prismatic, bright red amarantite crystals.
Location: Chuquicamata, Antofagasta, Chile. Scale: Crystal size 3 cm.
© Tom Loomis / Dakota Matrix

Amber

Comments: Rectangular specimen of dark, transparent amber with a large spider entombed inside.
Location: Bitterfeld, Saxony, Germany. Scale: 14x10x10 mm.
© John Betts - Fine Minerals

Amblygonite

Comments: Grayish, massive amblygonite from the type locality.
Location: Chursdorf, Penig, Chemnitz, Saxony, Germany. Scale: Specimen size 35 mm.
© Thomas Witzke / Abraxas-Verlag

Amesite

Comments: White, massive amesite between quartz.
Location: Missoula, Missoula County, Montana, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Amesite   Titanite

Comments: Green titanite (sphene) crystals on purple chromamesite (clinochlore?).
Location: Saranovskaya Deposit, Middle Ural Mountains, Russia. Scale: Picture size 7 cm.
© Dave Barthelmy

Amicite

Comments: White amicite crystals in massive amicite.
Location: Howenegg, Hegau, Baden-Wurttemberg, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Aminoffite

Comments: Clear, pyramidal aminoffite crystal.
Location: Langban, Varmland, Sweden. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Ammonioalunite   Kaolinite

Comments: White chalky ammonioalunite on darker kaolinite.
Location: Schoeller Mine, Kladno, Stredocesky, Czech Republic. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Analcime

Comments: Brownish yellow transparent analcime crystals.
Location: Guam. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Analcime   Serandite   Natrolite

Comments: Orange-red, blocky serandite with white, blocky natrolite and white, equant grains of analcime.
Location: Mt. St. Hilaire, Canada. Scale: 4 x 3 cm.
© Fabre Minerals

Analcime   Behoite

Comments: Gray-white microcline crystals up to 4 cm coated with overgrowth of analcime 18 mm diameter, black aegirine up to 25 mm and most notable, a pale pink behoite.
Location: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mt Saint-Hilaire, Rouville Co., Qu?bec, Canada. Scale: 5x4x3 cm.
© John Betts - Fine Minerals

Anandite   Gillespite

Comments: Black micaceous anandite with dark red gillespite.
Location: Esquire No. 7 Claim, Big Creek, Fresno County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Anapaite

Comments: Specimen of anapaite on limonite. There are two distinct crystal forms of anapaite - both bladed or tabular and spiky (See inset images).
Location: Taman Peninsula, Black Sea, Russia. Scale: 6 x 5 cm.
© John Veevaert

Anatase

Comments: anatase with calcite.
Location: Hardangervidda, Norway, (1999). Scale: 1.5 x 3 cm.
© Fabre Minerals

Ancylite-(Ce)

Comments: Pinkish brown ancylite-(Ce) blades.
Location: Mont St. Hilaire, Quebec, Canada. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Andalusite

Comments: Wine colored andalusite associated with mica.
Location: Sierra Albarrana, Cordoba, Spain. Scale: 4.5 x 3.5 cm.
© Fabre Minerals

Andersonite

Comments: Yellow crusts of andersonite in sandstone.
Location: Atomic King mine, San Juan County, Utah, USA. Scale: 4x3x2 cm.
© John Veevaert

Andersonite

Comments: Veins of bright yellowish green, andersonite in sandstone. The fluorescence of this mineral is noticeable under ambient office lighting plus a UV lamp.
Location: Atomic King Mine, Cane Creek Canyon, Grand County, Utah, USA. Scale: Specimen size 6 cm.
© Paul M. Schumacher

Andesine   Plagioclase

Comments: Translucent andesine crystal twin.
Location: Maeyama Ueda shi, Nagano, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Andorite

Comments: Metallic, prismatic andorite crystal.
Location: Baie Sprie (Felsobanya), Maramures, Romania. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Andorite   Ferrokesterite

Comments: Small, tetragonal crystal of gray ferrokesterite (circled in thumbnail) attached on the surface of a larger striated andorite specimen.
Location: San Jose mine, Oruro, Bolivia. Scale: Crystal size 0.2 mm.
© John Veevaert

Andradite   Clinochlore

Comments: Transparent topazolite, the yellow variety of andradite on clinochlore.
Location: Yellow Cat Mine, New Idria District, San Benito County. California, USA. Scale: 2.7 x 2.5 cm.
© Fabre Minerals

Andradite

Comments: Andradite (var. Demantoid) Garnet.
Location: Namgar mine, Erongo Mts. Namibia. Scale: 3.5 x 3.2 cm.
© Fabre Minerals

Anduoite

Comments: Backscattered electron Image of euhedral anduoite crystal enclosed in chromian spinel containing lamellae of ilmenite. Image on left is large view, image on right is detailed view. (CanMin, v 39, p 596).
Location: Chromitite ore, Kapitanov deposit, Ukrainian Shield, Ukraine. Scale: See Image.
© Canadian Mineralogist

Angelellite

Comments: Back microcrystalline angelellite on matrix.
Location: Cerro Pululus Tin Mine, Jujuy, Argentina. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Anglesite

Comments: Crystalline anglesite with minor duftite. The crystal at the top of the specimen is partially doubly terminated.
Location: Tsumeb Mine, Tsumeb, Namibia. Scale: 2.7 x 2.1 cm.
© John Veevaert

Anglesite

Comments: White anglesite crystals with dark gray posnjackite.
Location: (1st Oxidation Zone), Tsumeb, Namibia. Scale: 8.5 x 5 x 4 cm.
© John Schneider

Anhydrite

Comments: Several terminated groups of light blue anhydrite crystals in parallel growth.
Location: Naica. Chihuahua, Mexico. Scale: 9.5 x 8 x 6 cm.
© Isaias Casanova / IC Minerals

Ankerite   Sphalerite   Dickite

Comments: White, rhombohedral crystals of ankerite and dark gray, metallic sphalerite on beige dickite.
Location: Prego mine, Kladno, Czech Rebublic. Scale: Picture size 2 cm.
© Dave Barthelmy

Annabergite

Comments: Green spray of annabergite crystals.
Location: Laurium, Greece. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Annite

Comments: Bottle-green manganoan annite fragment.
Location: Thiemendorf, K?nigshain, Oberlausitz, Saxony, Germany. Scale: Picture size 2.5 mm.
© Thomas Witzke / Abraxas-Verlag

Anorthite   Plagioclase

Comments: Opaque white crystal of anorthite with dark brown solidified lava coating.
Location: Miyake-jima, Shizuoka, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Anorthoclase

Comments: Two white crystals of anorthoclase (possibly mislabeled and actually anorthite.
Location: Kusukidani, Wakayama Prefecture, Kinki Region, Honshu island, Japan. Scale: 15x14x6 mm.
© John Betts - Fine Minerals

Ansermetite

Comments: Environmental scanning electron microscope image of the ansermetite crystals. (CanMin, v 41, p 1425).
Location: Fianel, Val Ferrera, Eastern Swiss Alps. Scale: Scale bar 20 µ-m.
© Canadian Mineralogist

Anthoinite   Cerotungstite-(Ce)   Ferberite

Comments: Yellow cerotungstite-(Ce), with black ferberite veins and whitish anthoinite.
Location: Bugarama, Rwanda. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Anthoinite   Mpororoite

Comments: White chalky massive mpororoite with brown anthoinite.
Location: Kara Mine, Tasmania, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Anthophyllite   Biotite

Comments: Fibrous mass of anthophyllite as a shell around biotite.
Location: Hermanov, Severocesky, Czech Republic. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Antigorite

Comments: Yellowish green, fibrous antigorite.
Location: East Broughon, Quebec, Canada. Scale: 22x10 cm.
© Dave Barthelmy

Antigorite   Chromite

Comments: Chromite veins in yellow to green antigorite with picrolite, chromian antigorite and dolomite (polished section).
Location: Wood's Mine, near 'Texas', Little Britain Township, Lancaster County, Pennsylvania, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Antimony

Comments: Massive pure native antimony.
Location: Arechuybo, Chihuahua, Mexico. Scale: Size Not Given.
© John Veevaert

Antimony   Valentinite

Comments: Beige valentinite crystals with red kermesite in a matrix of gray, massive antimony.
Locatio