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Mendipite: Pb3Cl2O2 Chloroxiphite: Pb3CuCl2(OH)2O2 Crednerite: CuMnO2
Comments: Green, opaque granular chloroxiphite with mendipite and black crednerite. Location: Higher Pitts Farm, Priddy, Mendip Hills, Somerset, England. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Mendipite: Pb3Cl2O2 Crednerite: CuMnO2 Chloroxiphite: Pb3CuCl2(OH)2O2
Comments: Radiating compact with clear to white crystalline mendipite with black crednerite and green chloroxiphite. Location: Mendip Hills, Somerset, England. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Mendozavilite: (Na,Mg)Ca2[Mo++++++8P+++++2Fe+++3O36(OH)]·n(H2O), n~9
Comments: Vuggy matrix covered with yellow micro crystals of mendozavilite. Location: Rustler mine, Tooele County, Utah, USA. Scale: Specimen size 1 cm. © John Veevaert
Comments: Light yellow micro crystals of mendozavilite and earthy alterations in vuggy quartz matrix with black schorl. Location: Rustler mine, Tooele Co., Utah, USA. Scale: Picture size 1 cm. © Tom Loomis / Dakota Matrix
Mendozite: NaAl(SO4)2·11(H2O)
Comments: White chalky massive mendozite. Location: Gold Bottom Mine, Inyo County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Meneghinite: Pb13CuSb7S24
Comments: Black, acicular crystals of meneghinite on matrix. Location: Bottino Mine, Tuscany, Italy. Scale: 1x1 cm. © Dave Barthelmy
Menezesite: Ba2MgZr4(BaNb12O42)·12H2O
Comments: Orange rhombododecahedral crystals of menezesite to 0.75mm on matrix. Location: Jacupiranga mine, Cajati county, Sao Paulo, Brazil. Scale: Picture size 1 cm. © Tom Loomis / Dakota Matrix
Comments: Brownish-red rhombododecahedral crystals of menezesite over calcite (with tiny black tochilinite inclusions). AmMin v93:82. Location: Jacupiranga mine, in Cajati county, São Paulo state, Brazil. Scale: Crystal size 0.5 mm. © American Mineralogist
Menshikovite: Pd3Ni2As3 Paolovite: Pd2Sn
Comments: BSE image showing menshikovite (mnv), paolovite (plv), isomertieite (ism), cobaltite (cob), and chalcopyrite (ccp) with quartz (qtz) and a Fe-rich aluminosilicate (sil). Location: Lower (exo)-contact of the Chiney intrusion in Siberia. (CanMin, v40:679). Scale: See Image. © Canadian Mineralogist
Mercallite: KHSO4
Comments: Pale blue to white powdery aggregate of mercallite. Location: Vesuvius, Campania, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Mercury: Hg
Comments: Silvery metallic mercury coatings on quartz. Location: Socrates Mine, Sonoma County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Comments: Small silvery droplets of mercury on tan-colored rock matrix. Location: Sonoma Co., California, USA. Scale: Picture size 5 cm. © Kevin Ward
Mereheadite: Pb2O(OH)Cl
Comments: Yellowish crystals of mereheadite to 1mm embedded in matrix. Location: Merehead quarry, Shepton Mallet, Somerset, England. Scale: Picture size 5 mm. © Tom Loomis / Dakota Matrix
Merenskyite: (Pd,Pt)(Te,Bi)2 Borovskite: Pd3SbTe4 Temagamite: Pd3HgTe3
Comments: Borovskite (Bvk) - temagamite (Tmg) - merenskyite (Mrk) composite grain included in chalcopyrite (Ccp). (CanMin, v 42, p 674). Location: McBratney high-grade PGE-Au occurrence, Bear Lake mafic unit, Proterozoic Flin Flon greenstone belt, Manitoba, Canada. Scale: See Image. © Canadian Mineralogist
Meridianiite: MgSO4·11H2O
Comments: Red arrow points meridianiite on the underside of a post in a frozen pond. Ice, in the form of snow covers the top of the post and the frozen pond surface (AmMin, v92:1757). This in an analoge for probable Martian occurrences. Location: The ponds are on the Basque claims, which occur in a small valley in the Thompson region of central British Columbia. Scale: See Image. © American Mineralogist
Merlinoite: (K,Ca,Na,Ba)7Si23Al9O64·23(H2O)
Comments: Colorless transparent prismatic merlinoite microcrystals in vug. Location: Lagno Ahendo Lare, Vesuvius, Naples, Campania, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Merrihueite: (K,Na)2(Fe++,Mg)5Si12O30 Chayesite: K(Mg,Fe++)4Fe+++(Si12O30)
Comments: A sharp, chemically zoned crystal of copper-brown merrihueite(?) (see Lapis-Magazine 4/2002 Page 38/39) overgrown on bluish chayesite. Location: Basalt quarry, Pauliberg Mt., Kobersdorf, Oberpullendorf, Burgenland, Austria. Scale: Crystal Size 0.15 cm. © Jeff Weissman / Photographic Guide to Mineral Species
Merrillite: Ca18Na2Mg2(PO4)14
Comments: BSE image of merrillite intergrown with silicates (plagioclase (plag), orthopyroxene(opx), olivine(ol)) next to coarse FeNi-metal (white). Location: Portales Valley meteorite (1988). Scale: See Image. © Alex Ruzicka / Planetary Science Research
Mertieite-II: Pd8(Sb,As)3
Comments: Oil immersion hotomicrograph of inclusions of mertieite-II in matrix of Pt-Fe alloy (CanMin, v 42, p 614). Location: Kondyor PGE placer, Khabarovskiy Kray, eastern Siberia, Russia. Scale: See Image. © Canadian Mineralogist
Merwinite: Ca3Mg(SiO4)2
Comments: Dark brown crystalline merwinite in light green crystalline massive marble. Location: Crestmore Quarry, Riverside County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species