's Image Gallery

Manganohornesite: (Mn,Mg)3(AsO4)2·8(H2O)

Comments: Micro, white, needles of manganese-hornesite to about 0.75mm on hausmannite-rich matrix.
Location: Langban, Varmland, Sweden. Scale: 5.5 x 4 x 2.5cm.
© Tom Loomis / Dakota Matrix

Manganokhomyakovite: Na12Sr3Ca6Mn3Zr3W(Si25O73)(O,OH,H2O)3(OH,Cl)2

Comments: Pseudo-octahedral Manganokhomyakovite crystals. (CanMin, v37:893).
Location: Mont Saint-Hilaire, Quebec, Canada. Scale: Crystal Size 0.51 mm.
© László Horváth / Canadian Mineralogist

Manganokukisvumite: Na6MnTi4Si8O28·4(H2O)

Comments: Scanning electron photomicrograph of manganokukisvumite. (CanMin, v 42 , p 782).
Location: Mont Saint-Hilaire, Quebec. Scale: See Image.
© Canadian Mineralogist

Manganoneptunite: KNa2Li(Mn,Fe++)2Ti2Si8O24

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

Manganoneptunite: KNa2Li(Mn,Fe++)2Ti2Si8O24  
Shkatulkalite: {(Na,Mn,Ca,[ ])4[Nb2(O,H2O)4Si4O14](OH,F)2}·2(H2O,[ ])

Comments: Pearly white shkatulkalite with brown mangan-neptunite grains.
Location: Shkatulka pegmatite, Umbozero mine, Alluaiv Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture size 4.5 mm.
© Thomas Witzke / Abraxas-Verlag

Manganonordite-(Ce): Na3SrCeMn++Si6O17

Comments: Light brown radial aggregates of manganonordite-(Ce) in ussingite.
Location: Mt. Punkuruaiv, Lovozero, Kola Peninsula, Russia. Scale: Not Given.
© Diederik Visser

Manganosite: MnO

Comments: Dark green manganosite in matrix.
Location: Nordmark, Filipstad, Värmland, Sweden. Scale: Picture size 3.5 mm.
© Thomas Witzke / Abraxas-Verlag

Manganotychite: Na6(Mn++,Fe++,Mg)2(SO4)(CO3)4  
Aegirine: NaFe+++Si2O6

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

Manganvesuvianite: Ca19Mn+++(Al,Mn+++,Fe+++)10(Mg,Mn++)2Si18O69(OH)9

Comments: Dark cherry red prismatic, crystals or manganvisuvianite to 2mm on matrix.
Location: N'Chwanning mine, Kalahari Mn Field, North Cape Province, South Africa. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Manjiroite: (Na,K)(Mn++++,Mn++)8O16·n(H2O)

Comments: Dark brownish black massive sample of manjiroite.
Location: Arizona, USA. Scale: 3.8 X 5.6 cm.
© John Veevaert

Mannardite: BaTi6V+++2O16·(H2O)

Comments: Prismatic crystals of black, metallic lustered mannardite crystals in matrix.
Location: Kechica River, British Columbia, Canada. Scale: 3.4 X 4.5 cm.
© John Veevaert

Mansfieldite: AlAsO4·2(H2O)

Comments: White, spherical aggregates of mansfieldite.
Location: Cap Garonne Mine, Pradet, Var, Provence-Alpes-Côte d'Azur, France. Scale: Picture size 7 mm.
© Thomas Witzke / Abraxas-Verlag

Marcasite: FeS2

Comments: Metallic, brassy-colored marcasite with minor translucent quartz and white dolomite.
Location: Panasqueira (3rd level), in the region of Beira Baixa, Portugal. Scale: 8 x 5.5 cm.
© Fabre Minerals

Marecottite: Mg3(H2O)18[(UO2)4O3(SO4)2]2·10(H2O)

Comments: SEM image of a typical marecottite aggregate. Note the perfect cleavage along (011) and the trace of the twin composition plane (arrow). (AmMin, v 88, p 678).
Location: La Creusaz, Swiss Alps. Scale: See Image.
© American Mineralogist

Marecottite: Mg3(H2O)18[(UO2)4O3(SO4)2]2·10(H2O)  
Magnesiozippeite: Mg(H2O)3.5(UO2)2(SO4)O2

Comments: Powdery and crystalline aggregates of red-brown marecottite and yellow magnesiozippeite on matrix.
Location: Svornost Mine, Jachymov, Bohemia, Czech Republic. Scale: Specimen Size 6.5x9 cm.
© Diederik Visser

Margaritasite: (Cs,K,H3O)2(UO2)2V2O8·(H2O)

Comments: Bright yellow earthy margaritasite crust on rhyolite.
Location: Margaritas Open Pit Mine, Sierra Pena Blanca, Chihuahua,. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Margarite: CaAl2(Al2Si2)O10(OH)2

Comments: Beige, massive, fibrous/foliated aggregate of margarite crystals.
Location: Long Hill/Old Tungsten Mine in Trumbull, Connecticut, USA. Scale: 10 x 5 cm.
© Walter Mroch / Gem and Mineral Exploration Company

Margarosanite: Pb(Ca,Mn++)2Si3O9  
Minehillite: (K,Na)2-3Ca28(Zn4Al4Si40)O112(OH)16  
Wollastonite-1A: CaSiO3

Comments: White pearly crystalline minehillite with white margarosanite and dark gray lead, in pale pink opaque wollastonite (distinguished by blue-white fluorescence).
Location: Franklin, Sussex County, New Jersey, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Margarosanite: Pb(Ca,Mn++)2Si3O9

Comments: Clear or white, long, thin bladed crystals of margarosanite on matrix.
Location: Langban, Varmland, Sweden. Scale: Crystal size 1cm.
© Tom Loomis / Dakota Matrix

Marialite: Na4Al3Si9O24Cl

Comments: Fully terminated 4.3 cm crystal of marialite. Weakly fluorescent red under SW UV light.
Location: Gooderham, Haliburton Co., Ontario, Canada. Scale: 6 x 1.5 cm.
© John Veevaert