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Mitridatite: Ca2Fe+++3(PO4)3O2·3(H2O)
Comments: Dark brown crystals of mitridatite on whitlockite. Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Molybdofornacite: Pb2Cu[(As,P)O4][(Mo,Cr)O4](OH)
Comments: Lime green, tabular crystals of molybdofornacite on matrix. Location: Mahoney district, Tres Hermanas Mountains, Luna County, New Mexico, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Monazite-(Ce): (Ce,La,Nd,Th)PO4
Comments: Orange crystals of monazite-(Ce) on lepidolite. Location: Conselheiro Pena, Minas Gerais, Brazil. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Montebrasite: LiAl(PO4)(OH,F)
Comments: Transparent, pale yellow, tabular crystals of Montebrasite on matrix. Location: Newry, Oxford County, Maine, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Mooreite: (Mg,Zn,Mn)15(SO4)2(OH)26·8(H2O)
Comments: Translucent, wedge-shaped crystals of mooreite on matrix. Location: Franklin, Sussex County, New Jersey, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Moraesite: Be2(PO4)(OH)·4(H2O)
Comments: Silky, tufted crystals of white moraesite on matrix. Location: Divino das Laranjeiras, Minas Gerais, Brazil. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Mordenite: (Ca,Na2,K2)Al2Si10O24·7(H2O) Heulandite-Ca: (Ca,Na)2-3Al3(Al,Si)2Si13O36·12(H2O)
Comments: White, acicular crystals of mordenite in heulandite geode. Location: Rock Creek, Stevenson, Skamania County, Washington, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Mosesite: Hg2N(Cl,SO4,MoO4,CO3)·(H2O)
Comments: Yellow, hoppered crystal of mosesite on matrix. Location: Terllingua, Brewster County, Texas, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Mounanaite: PbFe+++2(VO4)2(OH)2
Comments: Yellow crystal of mounanaite on matrix. Location: Mounana, Haut-Ogoue, Gabon. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Nacrite: Al2Si2O5(OH)4
Comments: Colorless, transparent crystal of macrite on matrix. Location: Hunersedge mine, Baden-Wurttemburg, Germany. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals