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Anthoinite: AlWO3(OH)3 Mpororoite: Al(WO3)(OH)3·2(H2O)
Comments: White chalky massive mpororoite with brown anthoinite. Location: Kara Mine, Tasmania, Australia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Anthoinite: AlWO3(OH)3 Cerotungstite-(Ce): (Ce,REE)W2O6(OH)3 Ferberite: Fe++WO4
Comments: Yellow cerotungstite-(Ce), with black ferberite veins and whitish anthoinite. Location: Bugarama, Rwanda. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Anthophyllite: [ ]Mg7Si8O22(OH)2 Biotite: K(Mg,Fe++)3[AlSi3O10(OH,F)2
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
Anthophyllite: [ ]Mg7Si8O22(OH)2 Magnesioanthophyllite: (Mg,Fe++)7Si8O22(OH)2
Comments: Schistose amphibolite rock composed primarily of anthophyllite (magnesioanthophyllite is now considered to be anthophyllite). Location: Winchester, Riverside County, California, USA. Scale: See Image. © Rruff Database
Antigorite: (Mg,Fe++)3Si2O5(OH)4 Chromite: Fe++Cr2O4
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
Antigorite: (Mg,Fe++)3Si2O5(OH)4
Comments: Yellowish green, fibrous antigorite. Location: East Broughon, Quebec, Canada. Scale: 22x10 cm. © Dave Barthelmy
Antimony: Sb
Comments: Massive pure native antimony. Location: Arechuybo, Chihuahua, Mexico. Scale: Size Not Given. © John Veevaert
Antimony: Sb Valentinite: Sb2O3
Comments: Beige valentinite crystals with red kermesite in a matrix of gray, massive antimony. Location: South-Ham Antimony mine, Lake Nicolet, Quebec, Canada. Scale: Picture Size 3 cm. © Dave Barthelmy
Antlerite: Cu3(SO4)(OH)4
Comments: Dark green crystals of antlerite on sandstone. Location: Ray mine, Ray, Pinal County, Arizona, USA. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Antlerite: Cu3(SO4)(OH)4 Metaschoepite: UO3·n(H2O)(n<2)
Comments: Yellow crystals of metaschoepite with green antlerite. Location: Pöhla-Tellerhäuser Gallery, Pöhla, Schwarzenberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 1.3 mm. © Thomas Witzke / Abraxas-Verlag
Apachite: Cu9Si10O29·11(H2O)
Comments: Spherical crystals 0.2mm of blue apachite as grape-like botryodal aggregates. Location: Christmas mine, Gila Co., Arizona, USA. Scale: Picture size 3.5 mm. © Tom Loomis / Dakota Matrix
Comments: Blue crusts of apachite on skarn rock. Location: Christmas Mine, near Hayden, Gila County, Arizona, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species