's Image Gallery

Magnesiohastingsite: NaCa2(Mg4Fe+++)Si6Al2O22(OH)2

Comments: Dark black-brown crystalline massive magnesiohastingsite.
Location: Afrikanda Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Magnesiohogbomite-2N2S: (Al,Fe++,Fe+++,Mg,Ti,Zn)11O15(OH)

Comments: Massive, fine-grained magnesiohogbomite-2N2S.
Location: Ruoutevare, Kvikkjokk, Lappland, Sweden. Scale: Specimen Size 3 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

Magnesioholmquistite: Li2(Mg,Fe++)3Al2Si8O22(OH)2  
Holmquistite: [ ](Li2Mg3Al2)Si8O22(OH)2

Comments: Dark blue thin bladed crystals of holmquistite (magnesioholmquistite) in amphibolite.
Location: Uto, Sodermanland, Sweden. Scale: See Image.
© Rruff Database

Magnesiohornblende: Ca2[Mg4(Al,Fe+++)]Si7AlO22(OH)2

Comments: Dark greenish-black massive magnesiohornblende.
Location: Willi Agatz Mine, Dresden, Saxony, Germany. Scale: Picture size 5.5 cm.
© Thomas Witzke / Abraxas-Verlag

Magnesiohulsite: (Mg,Fe++)2(Mg,Fe+++,Sn++++)O2(BO3)

Comments: Green fibrous massive magnesiohulsite.
Location: Itenyurgin, Chukot Peninsula, Magadan District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Magnesiokatophorite: Na(CaNa)Mg4AlSi7AlO22(OH)2

Comments: Black crystalline magnesiokatophorite in syenite.
Location: Kipiwa Complex, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Magnesiopascoite: Ca2Mg[V10O28]·16H2O

Comments: Intergrowth of orange magnesiopascoite crystals on V-U oxide replacement of organic material. CanMin v46:.
Location: Blue Cap mine, near La Sal, San Juan County, Utah, U.S.A.. Scale: Crystal size 2.2mm across.
© Canadian Mineralogist

Magnesioriebeckite: [ ]Na2[(Mg,Fe++)3Fe+++2]Si8O22(OH)2

Comments: Crystal of magnesioriebeckite showing massive and asbestosform habits.
Location: Cochabamba Dept, Bolivia. Scale: 2.5 cm.
© John Attard

Magnesiosadanagaite: NaCa2[Mg3(Al,Fe+++)2]Si5AlO22(OH)2

Comments: Magnesiosadanagaite mantled by phlogopite (brown) adjacent to corundum (variety ruby) in white marble. (CanMin, v46:151).
Location: Dattaw mine, Mogok Stone Tract, Mandalay Division, Myanmar. Scale: Picture size 4 cm.
© Canadian Mineralogist

Magnesiostaurolite: [ ]4Mg4Al16(Al,[ ])2Si8O40[O6,(OH)2]

Comments: White crystals of magnesiostaurolite in rose quartz.
Location: Dora Maira Massif, Cuneo Province, Piedmont, Italy. Scale: Specimen Size 42 x 27 x 25 mm.
© Sergey Vasiliev / Systematic Mineralogy

Magnesiotaaffeite-2N2S: Mg3Al8BeO16

Comments: Faucetted purple magnesiotaaffeite. These specimens are very rare and un-cut samples ever rarer..
Location: Ceylon gem gravels, Ratnapura, Sri Lanka. Scale: See Image.
© Dave Barthelmy

Magnesiotaaffeite-2N2S: Mg3Al8BeO16  
Magnesiotaaffeite-6N3S: (Mg,Fe++,Zn)2Al6BeO12  
Taaffeite:

Comments: BSE image of magnesiotaaffeite-6N3S (Mgt-6N3S) with a central lamella of magnesiotaaffeite-2N2S (Mgt-2N2S). Other minerals Spl: spinel; Chl: clinochlore.
Location: Polymetamorphic dolomite marble at Eastern Alps, Stubenberg, Styria, Austria. (CanMin, v46:1195). Scale: See Image.
© Canadian Mineralogist

Magnesiotaaffeite-6N3S: (Mg,Fe++,Zn)2Al6BeO12  
Magnesiotaaffeite-2N2S: Mg3Al8BeO16  
Taaffeite:

Comments: BSE image of magnesiotaaffeite-6N3S (Mgt-6N3S) with a central lamella of magnesiotaaffeite-2N2S (Mgt-2N2S). Other minerals Spl: spinel; Chl: clinochlore.
Location: Polymetamorphic dolomite marble at Eastern Alps, Stubenberg, Styria, Austria. (CanMin, v46:1195). Scale: See Image.
© Canadian Mineralogist

Magnesiotaramite: Na(CaNa)Mg3ALFe+++[Si6Al2O22](OH)2

Comments: Dark blue granular massive magnesiotaramite.
Location: Liset, Selje, Sogn og Fjordane, Norway. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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

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

Magnesite: MgCO3

Comments: Magnesite crystal group. The crystals have rhombic habit. The largest on this specimen is 3.7 cm across.
Location: Brumado Mine, Bahia, Brazil. Scale: Photo by John Veevaert.
© John Veevaert

Magnetite: Fe++Fe+++2O4

Comments: Black, opaque octahedral crystals of magnetite on matrix.
Location: Isle of Ischia, near Naples, Compania, Italy. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Magnetite: Fe++Fe+++2O4  
Nordenskioldine: CaSnB2O6

Comments: Colorless to white bladed crystals of nordenskiöldine with black magnetite.
Location: Pöhla-Tellerhäuser Gallery, Pöhla, Schwarzenberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Magnetite: Fe++Fe+++2O4  
Chesterite: (Mg,Fe++)17Si20O54(OH)6

Comments: Green platy chesterite in black, metallic magnetite.
Location: Near Missoula, Missoula County, Montana, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Magnetoplumbite: Pb(Fe+++,Mn+++)12O19

Comments: Black magnetoplumbite masses in calcite.
Location: Langban, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species