's Image Gallery

Macquartite: Pb3Cu(CrO4)(SiO3)(OH)4·2(H2O)

Comments: Bright yellow, prismatic crystals of macquartite in radial sprays to 0.75mm.
Location: Tiger, Mammoth district, Pinal County, Arizona, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Madocite: Pb17(Sb,As)16S41

Comments: Gray metallic massive madocite fragment.
Location: Madoc, Ontario, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Magadiite: NaSi7O13(OH)3·4(H2O)  
Rhodesite: KHCa2Si8O19·5(H2O)

Comments: Earth pale tan massive magadiite with dark yellow crystalline rhodesite.
Location: East Fork, Trinity River, Trinity County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Maghagendorfite: NaMgMn(Fe++,Fe+++)2(PO4)3

Comments: BSE image of graftonite groundmass (Gft) with microgranules of maghagendorfite (Mhg), triphylite (Trp), ludlamite (Lud), and quartz (Qtz). (CanMin, v46:635).
Location: Brissago Granitic Pegmatites, Western Southern Alps, Canton Ticino, Switzerland. Scale: See Image.
© Canadian Mineralogist

Maghemite: gamma-Fe+++2O3

Comments: Fine-grained massive maghemite intermixed with hematite.
Location: Gara Djebilet, Algeria. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Magnesio-arfvedsonite: NaNa2(Mg4Fe++)Si8O22(OH)2  
Vitusite-(Ce): Na3(Ce,La,Nd)(PO4)2

Comments: Translucent beige-colored vitusite-(Ce) in a rim around a black magnesio-arfvedsonite crystal.
Location: Yubileinaya Vein, Karnasurt Mountain, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Russia. Scale: Specimen Size 4x3x3 cm.
© John Betts - Fine Minerals

Magnesio-arfvedsonite: NaNa2(Mg4Fe++)Si8O22(OH)2  
Nordite-(La): (Na,Mn)3(Sr,Ca)(La,Ce)(Zn,Mg)Si6O17

Comments: Large tabular crystal of brownish nordite-(La). Accessory minerals are white chalky natrolite and black prismatic magnesioarfvedsonite.
Location: Kirovskii apatite mine (Kirovsky Mine; Kirov Mine), Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: FOV is 12x10 mm.
© Pavel M. Kartashov

Magnesioanthophyllite: (Mg,Fe++)7Si8O22(OH)2  
Anthophyllite: [ ]Mg7Si8O22(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

Magnesioastrophyllite: K2Na[Na(Fe++,Fe+++,Mn)Mg2]Ti2Si8O26(OH)4F

Comments: White chalky mass of magnesioastrophyllite in matrix.
Location: N'orkpakhk Mt., Khibiny Massif, Kola Peninsula, Russia. Scale: Specimen Size 35 x 25 x 10 mm.
© Sergey Vasiliev / Systematic Mineralogy

Magnesioaubertite: (Mg,Cu)Al(SO4)2Cl·14(H2O)  
Pickeringite: MgAl2(SO4)4·22(H2O)

Comments: Aqua crystalline magnesioaubertite with white pickeringite.
Location: Grotto di Faraglione, Vulcano, Sicily, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Magnesiochromite: MgCr2O4

Comments: Black crystalline magnesiochromite grains in serpentinite.
Location: Red Pit, Fulton Township, Lancaster County, Pennsylvania, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Magnesioclinoholmquistite: Li2(Mg,Fe++)3Al2Si8O22(OH)2  
Clinoholmquistite: [ ](Li2Mg3Al2)Si8O22(OH)2  
Fluoro-sodic-pedrizite: NaLi2(Mg2Al2Li)?5Si8O22F2

Comments: Dark blue fibrous clinoholmquistite with radiating structure, variety magnesioclinoholmquistite. Clinoholmsquitite may be a new aphibole, fluoro-sodic-pedrizite..
Location: Near Murun, Republic of Sakha, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Magnesiocopiapite: MgFe+++4(SO4)6(OH)2·20(H2O)  
Guildite: CuFe+++(SO4)2(OH)·4(H2O)

Comments: Brown granular guildite with greenish yellow magnesiocopiapite.
Location: United Verde Mine, Jerome, Yavapai County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Magnesiocopiapite: MgFe+++4(SO4)6(OH)2·20(H2O)

Comments: Pale yellow opaque aggregate of magnesiocopiapite.
Location: Denver Mine, Santa Cruz County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Magnesiocoulsonite: MgV+++2O4  
Tremolite: [ ]Ca2Mg5Si8O22(OH)2

Comments: Black grains of magnesiocoulsonite with green chromian tremolite. Metallic bronze grain of thiospinelid of kalininite-florensovite series is visible in the upper right corner of the image.
Location: Pereval Marble Quarry, Slyudyanka (Sludyanka), Lake Baikal area, Irkutskaya Oblast', Prebaikalia (Pribaikal'e), Eastern-Siberian Region, Russia. Scale: FOV is 3x2 mm.
© Pavel M. Kartashov

Magnesioferrikatophorite: Na2Ca(Mg,Fe++)4Fe+++Si7AlO22(OH)2

Comments: Double-terminated short-prismatic crystal of titanoan (2.17 % TiO2) magnesioferrikatophorite from a nephelin-syenite pegmatite.
Location: Northeast slope, Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Not Given.
© Pavel M. Kartashov

Magnesioferrite: MgFe+++2O4  
Diopside: CaMgSi2O6

Comments: Very dark brown Magnesioferrite Pleonaste (Iron-Magnesium spinel) with cream colored Calcite and gray green diopside.
Location: Aldan, Gon River, Russia. Scale: 6 x 4.5 cm.
© Fabre Minerals

Magnesioferrite: MgFe+++2O4  
Bromellite: BeO

Comments: A micro, water color, hexagonal or barrel shaped crystal of white bromellite to about 0.3 mm on yellowish calcite with associated black magnesioferrite.
Location: Langban, Varmland, Sweden. Scale: 18x9x10mm.
© Tom Loomis / Dakota Matrix

Magnesiofoitite: [ ](Mg2Al)Al6(Si6O18)(BO3)3(OH)4

Comments: Aggregate of greenish-brown acicular crystals of magnesiofoitite.
Location: Kyonosawa, Mitomi-mura, Yamanashi prefecture, Chubu region, Honshu island, Japan. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Magnesiogedrite: (Mg,Fe++)5Al2Si6Al2O22(OH)2  
Gedrite: [ ]Mg5Al2Si6Al2O22(OH)2

Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite).
Location: Bamble, Telemark, Norway. Scale: See Image.
© Rruff Database