Mineral Specimen Images (A)

Atheneite: (Pd,Hg)3As

Comments: BSE image of Hg-bearing palladian gold (Au-Pd-Hg), Pd-poor gold and associated PGM in a Mn-Ba-O matrix (possibly romanechite, dark grey). Note that the crystals of atheneite [(Pd,Hg)3As] are on the surface of the Au-Pd-Hg alloy.
Location: Drill-core, recovered in 1982 from the near-surface lateritic portion of the Serra Pelada garimpo (1980-1984) bonanza, Carajas mineral province, Northern Brazil. (CanMin, v40:1451). Scale: See Image.
© Canadian Mineralogist

Atlasovite: Cu6Fe+++Bi+++O4(SO4)5·KCl

Comments: Small brown crystal fragment with inset image of the peg support in a sample box.
Location: Tolbachik Volcano, Main Fracture, North Breakthrough, Kamchatka Peninsula, Russia. Scale: Not Given, See Image.
© Sergey Vasiliev / Systematic Mineralogy

Atokite: (Pd,Pt)3Sn  
Taimyrite: (Pd,Cu,Pt)3Sn

Comments: Photomicrograph (oil immersion) of atokite and taimyrite intergrowth inside tetraauricupride reaction rim on Pt-Fe alloy. Outlined section shows atokite relics within taimyrite. (CanMin, v 42, p 610).
Location: Kondyor PGE placer, Khabarovskiy Kray, eastern Siberia, Russia,. Scale: See Image.
© Canadian Mineralogist

Atokite: (Pd,Pt)3Sn  
Sobolevskite: PdBi

Comments: Back-scattered electron image showing a) intergrowth of atokite, mertieite-II [Pd8Sb3] and telluroan sobolevskite [(Pd,Pt)(Bi,Te)] within tetra-auricupride rim. (CanMin, v 42, p 611).
Location: Kondyor PGE placer, Khabarovskiy Kray, eastern Siberia, Russia. Scale: See Image.
© Canadian Mineralogist

Atokite: (Pd,Pt)3Sn  
Palarstanide: Pd8(Sn,As)3

Comments: Polished Section (PPL) showing light gray euhedral palarstanide (P) surrounded by white atokite (A) in light brownish cubanite (C).
Location: Talnakh, Ural, Russia. Scale: Picture Size 0.14 mm.
© Thomas Witzke

Attakolite: (Ca,Sr)Mn++(Al,Fe+++)4[(Si,P)O4]H(PO4)3(OH)4

Comments: Pink to yellowish attakolite with black hematite.
Location: Vestana Iron Mine, near Nasum, Skane, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Attikaite: Ca3Cu2Al2(AsO4)4(OH)4·2H2O

Comments: Light blue crusts of attikaite on a gossenous matrix.
Location: Christiana Mine, Lavrion (Laurium) Mining District, Attica Peninsula, Greece. Scale: Picture size 5 mm.
© John Betts - Fine Minerals

Aubertite: CuAl(SO4)2Cl·14(H2O)

Comments: Aqua to white massive aubertite.
Location: Chuquicamata, Antofagasta, Chile. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Augelite: Al2(PO4)(OH)3

Comments: Apple green augelite with semi-transparent, well developed, brilliant crystals.
Location: Rapid Creek, Yukon, Canada. Scale: 3.5 x 2 cm.
© Fabre Minerals

Augelite: Al2(PO4)(OH)3

Comments: Green to white, striated, blocky augelite crystal on matrix.
Location: Ortega mine, Ancash dept., Peru. Scale: Crystal length 2.3 cm.
© Tom Loomis / Dakota Matrix

Augite: (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6

Comments: Clear, dark gray augite prisms in matrix.
Location: Isle of Ischia, near Naples, Compania, Italy. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Augite: (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6  
Calzirtite: CaZr3TiO9  
Richterite: Na(CaNa)(Mg,Fe++)5[Si8O22](OH)2

Comments: Gray irregular grain of calzirtite (see arrow) in fibrous augite with dark red richterite.
Location: Jacupiranga Mine, Cajati, Sao Paulo, Brazil. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Augite: (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6  
Tuscanite: K(Ca,Na)6(Si,Al)10O22(SO4,CO3,(OH)2)·(H2O)

Comments: Translucent tuscanite microcrystal in in vug in low-Fe augite (var. fassaite).
Location: Pitigliano Quarry, Grosseto, Tuscany, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Aurichalcite: (Zn,Cu)5(CO3)2(OH)6

Comments: Sky-blue radiating acicular crystals of aurichalcite covering matrix.
Location: Lucin, Utah, USA. Scale: 6.5 x 3 x 2 cm with 5 mm crystals.
© Dan Weinrich

Auricupride: Cu3Au

Comments: Golden metallic veins of auricupride in quartz.
Location: Vacos Hielados, Chile. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Aurivilliusite: Hg+Hg++OI

Comments: Dark reddish brown aurivilliusite-bearing ‘splattered’ patch on quartz.
Location: Clear Creek claim, San Benito County, California, USA. Scale: See Image.
© Mineralogical Magazine

Aurorite: (Mn,Ag,Ca)Mn++++3O7·3(H2O)

Comments: Brown, dendritic aurorite in white calcite.
Location: Aurora Mine, Hamilton, White Pine County, Nevada, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Aurostibite: AuSb2  
Criddleite: TlAg2Au3Sb10S10

Comments: B&W polished section image of criddleite (grey) surrounding and penetrating aurostibite (white) within quartz gangue. (MinMag, v52:691).
Location: Hemlo gold deposit, Hemlo, Ontario, Canada. Scale: See Image.
© Mineralogical Magazine

Austinite: CaZn(AsO4)(OH)

Comments: Green, spherulitic clusters of austinite crystals.
Location: Gold Hill mine, Deep Creek Mts., Tooele County, Utah, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Autunite: Ca(UO2)2(PO4)2·10-12(H2O)

Comments: Fluorescent, tabular to platy, yellow green autunite crystals on matrix.
Location: Margnac, Haute Vienne, France. Scale: 1 cm.
© John Veevaert