Click on thumbnails for a larger image. Please be patient since some of these pages of thumbnail images take some time to load. These mineral photos are copyrighted by their owners and may not be used without permission.
Malayaite: CaSnSiO5 = CaSnOSiO4
Comments: Pale bluish colored malayaite under visible and SWUV light. Location: Red-a-Ven Mine, Meldon, Okehampton, Devon, Great Britain. Scale: 3.7 x 2 cm. © John Veevaert
Maldonite: Au2Bi
Comments: PPL polished section showing maldonite grain associated with native bismuth (Bi) and exsolved bismuth-gold areas.. Location: Escanaba Trough at the southern end of the Gorda Ridge. (Geology, v36:815). Scale: See Image. © Geology
Maleevite: BaB2Si2O8
Comments: Backscatter elecron images of (a) an intergrowth of maleevite (Mal) and quartz (Qtz) and unknown Y-silicate (Y-Si); (b) maleevite (Mal) in arfvedsonite and astrophyllite (Astr) (CanMin, v 42, p 109). Location: Moraine of the Dara-i-Pioz glacier, Alai range, Tien Shan, northern Tajikistan. Scale: See Image. © Canadian Mineralogist
Malhmoodite: FeZr(PO4)2·4(H2O)
Comments: Small white aggregate of malhmoodite on matrix. Location: Union Carbide Mine, Wilson Springs (Potash Sulfur Springs), Garland Co., Arkansas, USA. Scale: Picture size 1 mm. © Thomas Witzke / Abraxas-Verlag
Malinkoite: NaBSiO4
Comments: White to clear glassy mico crystals of malinkoite to less than 0.75mm deep in a vug. Location: Mont St. Hilaire, Rouville Co., Quebec, Canada. Scale: 2 x 1.5 x 1.5 cm. © Tom Loomis / Dakota Matrix
Malladrite: Na2SiF6 Avogadrite: (K,Cs)BF4
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
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
Mallestigite: Pb3Sb+++++(SO4)(AsO4)(OH)6·3(H2O)
Comments: Colorless prismatic crystals of mallestigite. Location: Mallestiger Mittagskogel, Finkenstein, Villach, Carinthia, Austria. Scale: Picture size 1.5 mm. © Thomas Witzke / Abraxas-Verlag
Mammothite: Pb6Cu4AlSb+++++O2(SO4)2Cl4(OH)16
Comments: Sparse blue crystalline mammothite in slag. Location: Laurium, Attiki, Greece. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Manaksite: KNaMn++Si4O10 Bario-olgite: Na(Ba,Sr,Na,REE)PO4
Comments: Pale brown massive manaksite associated with grayish-green bario-olgite, purple ussingite and colorless serandite. Location: Palitra pegmatite, Kedykverpakhk Mountain, Lovozero massif, Kola Peninsula, Russia. Scale: See Image. © Rruff Database
Manandonite: Li2Al4[(Si2AlB)O10](OH)8
Comments: Massive manandonite with crystals to 2 mm. Location: Manandona River, Sahatany Valley, Madagascar. Scale: 2.2 x 1.3 cm. © John Veevaert
Manasseite: Mg6Al2(CO3)(OH)16·4(H2O)
Comments: Brownish yellow crystal of manasseite on dolomite matrix. Location: Jacupiranga mine, Jacupiranga, Sao Paolo, Brazil. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Mandarinoite: Fe+++2Se3O9·6(H2O)
Comments: Specimen of solid manandonite with crystals to 2 mm. Location: Manandona River, Sahatany Valley, Madagascar. Scale: 2.2 x 1.3 cm. © John Veevaert
Manganbabingtonite: Ca2(Mn,Fe++)Fe+++Si5O14(OH)
Comments: Brownish black manganbabingtonite associated with pink Inesite blades. Location: Hubei, China. Scale: 8 x 5.7 cm. © Fabre Minerals
Manganbelyankinite: (Mn,Ca)(Ti,Nb)5O12·9(H2O)
Comments: Brownish to blackish manganbelyankinite coatings on syenite rock. Location: Punkurvaiv, Lovozero Massif, Kola Peninsula, Murmansk District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Manganberzeliite: (Ca,Na)3(Mn,Mg)2(AsO4)3
Comments: Orange translucent crystalline manganberzeliite in clear calcite. Location: Langban, Varmland, Sweden. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Mangangordonite: (Mn++,Fe++,Mg)Al2(PO4)2(OH)2·8(H2O)
Comments: White, blocky crystal of mangangordonite to 0.5mm on matrix. Location: Foote mine, Cleveland Co., North Carolina, USA. Scale: Picture size 5 mm. © Tom Loomis / Dakota Matrix
Manganiandrosite-(La): (Mn,Ca)(La,Ce,Ca,Nd)AlMn+++Mn++(SiO4)(Si2O7)O(OH)
Comments: Orange glassy crystalline manganiandrosite-(La). Location: Mt. Petalon, Andros Island, Cyclades, Greece. Scale: Thumbnail. © Tom Loomis / Dakota Matrix
Manganilvaite: CaFe++Fe+++(Mn,Fe++)(Si2O7)O(OH)
Comments: Small, black, very bright crystals of manganilvaite on a matrix of clear quartz, white calcite, and tiny brassy pyrite crystals. Location: Daye mining area, Hubei, China. Scale: 6 x 5.6 x 3.7 cm. © Fabre Minerals
Manganipiemontite-(Sr): CaSr(Mn+++,Fe+++)2Al[Si3O12](OH)
Comments: Thin-section of (100) twinned tweddillite blades (red-orange-magenta ) in a matrix of serandite-pectolite (white-grey-yellow). Crossed polarizers. (MinMag 66:144). Location: Kalahari manganese fields (Republic of South Africa). Scale: Picture Size 1 mm. © Mineralogical Magazine