Mineral Specimen Images (A)

Autunite: Ca(UO2)2(PO4)2·10-12(H2O)  
Meta-autunite: Ca(UO2)2(PO4)2·2-6(H2O)

Comments: Corner of a meta-autunite crystal showing the dehydration of autunite (dark green) to meta-autunite (lighter yellowish green)..
Location: Daybreak Mine, Spokane County, Washington, U.S.A.. Scale: See Image.
© Paul M. Schumacher

Avdoninite: K2Cu5Cl8(OH)4·H2O

Comments: Aggregates of green avdoninite crystals.
Location: Blyava Cu Mine, Southern Urals, Russia. Scale: Specimen size 1.5 x 2 cm.
© Diederik Visser

Avicennite: Tl2O3

Comments: Grayish black polished crystals on microprobe sample mount.
Location: Thallium Prospect, Little Valley, Tooele County, Utah, USA. Scale: See Image.
© Rruff Database

Avogadrite: (K,Cs)BF4  
Ferruccite: NaBF4

Comments: Very small, white crystals of ferrite on massive, yellowish avogadrite.
Location: Vesuvius, Naples, Naples province, Campania, Italy. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Avogadrite: (K,Cs)BF4  
Malladrite: Na2SiF6

Comments: Botryoidal pinkish-white avogadrite with yellow malladrite.
Location: Eruption of 1926, Vesuvius, Campania, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Avogadrite: (K,Cs)BF4  
Malladrite: Na2SiF6

Comments: Yellow-orange crystalline malladrite with pinkish white avogadrite.
Location: Eruption of 1926, Vesuvius, Campania, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Awaruite: Ni2Fe to Ni3Fe

Comments: Massive awaruite.
Location: Heazlewood River, Tasmania, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Axinite-(Fe): Ca2Fe++Al2BO3Si4O12(OH)

Comments: Doubly terminated ferroaxinite crystal with good luster and form.
Location: Puyva, Polar Ural, Russia. Scale: 3x5x2 cm.
© Fabre Minerals

Axinite-(Mg): Ca2MgAl2BO3Si4O12(OH)

Comments: Cinnamon brown crystal of "axinite" (probably magnesio-axinite).
Location: El Fenomino Tungsten Mine, Northern Baja Californa, Mexico. Scale: Crystal size 2 cm.
© Dave Barthelmy

Axinite-(Mn): Ca2Mn++Al2BO3Si4O12(OH)

Comments: Dark brown crystal of manganaxinite on matrix.
Location: Kibblehouse quarry, Perkiomenville, Pennsylvania, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Azoproite: (Mg,Fe++)2(Fe+++,Ti,Mg)BO5

Comments: Black, acicular azoproite in matrix.
Location: Tazheran Massif, Transbaikalia, Irkutsk District, Siberia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Azurite: Cu3(CO3)2(OH)2  
Malachite: Cu2(CO3)(OH)2

Comments: Dark blue stubby pyramidal azurite crystals and green botryoidal-shaped radial aggregates of malachite.
Location: Nevada Lode Mine, San Juan Co., Utah, USA. Scale: 4 cm.
© Dave Barthelmy

Azurite: Cu3(CO3)2(OH)2  
Clinotyrolite: Ca2Cu9[(As,S)O4]4(OH)10·10(H2O)

Comments: Light blue acicular crystals of clinotyrolite on dark blue azurite.
Location: Lovelock mine, Churchill County, Nevada, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Azurite: Cu3(CO3)2(OH)2

Comments: Sharp, dark blue, crystalline azurite group.
Location: Puit IX, Touissit, Oujda. Scale: 5 x 3.3 x 1.3 cm.
© Fabre Minerals

Azurite: Cu3(CO3)2(OH)2  
Cyanotrichite: Cu4Al2(SO4)(OH)12·2(H2O)

Comments: Blue, hairy crystals of cyanotrichite with dark-blue, blocky azurite on a green, malachite matrix.
Location: Maid of Sunshine Mine, Cochise County, Arizona, USA. Scale: See Image.
© Jeff Weissman / Photographic Guide to Mineral Species