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.
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
Monteregianite-(Y): (Na,K)6(Y,Ca)2Si16O38·10(H2O)
Comments: Feathery, radiating pinkish-white acicular monteregianite crystals on one end of greenish matrix. Location: Desourdy Quarry, Mont Saint-Hilaire, Quebec, Canada. Scale: Specimen Size 5x2.5x2.5 cm.. © John Betts - Fine Minerals
Montesommaite: (K,Na)9Al9Si23O64·10(H2O)
Comments: Translucent prismatic montesommaite crystals in vugs. Location: Pollena Quarry, Vesuvius, Naples, Campania, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Montetrisaite: Cu6(SO4)(OH)10·H2O
Comments: SEM image of montetrisaite showing the splintery fracture. {010} face is shown. (CanMin, v47:143). Location: Monte Trisa, Torrebelvicino, Vicenza, Italy. Scale: See Image. © Canadian Mineralogist
Montgomeryite: Ca4MgAl4(PO4)6(OH)4·12(H2O)
Comments: Matrix specimen covered with sprays to 0.5 cm of salmon colored montgomeryite crystals. Location: Tip Top Mine, Custer County, South Dakota, USA. Scale: 13 x 8 cm. © John Veevaert
Montgomeryite: Ca4MgAl4(PO4)6(OH)4·12(H2O) Tiptopite: K2(Na,Ca)2Li3Be6(PO4)6(OH)2·(H2O)
Comments: Clear, acicular crystals of tiptopite with red montgomeryite. Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Montgomeryite: Ca4MgAl4(PO4)6(OH)4·12(H2O) Tiptopite: K2(Na,Ca)2Li3Be6(PO4)6(OH)2·(H2O) Englishite: K3Na2Ca10Al15(PO4)21(OH)7·26(H2O)
Comments: Red montgomeryite lath-like crystals to 1mm in 2mm rosettes associated with clear, acicular sprays of tiptopite to 0.75mm and white cottonball-like crystals of englishite to 0.2mm. Location: Tip Top mine, Custer Co., South Dakota, USA. Scale: Picture size 5 mm. © Tom Loomis / Dakota Matrix
Monticellite: CaMgSiO4
Comments: Pale brown crystalline massive monticellite. Location: Crestmore Quarry, Riverside County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Monticellite: CaMgSiO4 Melilite: (Ca,Na)2(Al,Mg,Fe++)(Si,Al)2O7
Comments: Thin-section image of monticellite interstitial between unaltered melilite crystals (CanMin v. 41. p 1259). Location: Skarns along the contact of a diorite intrusion at Oravit¸a, Banat, in Romania. Scale: Field of View 2.7 mm. © Canadian Mineralogist
Montmorillonite: (Na,Ca)0,3(Al,Mg)2Si4O10(OH)2·n(H2O)
Comments: Authigenic smectite (montmorillonite) overgrown on pore spaces and authigenicly-overgrown quartz grains in a sandstone. SEM image of a core sample. Location: Unknown. Scale: Picture size 67 µ-m. © OMNI Laboratories, Inc
Comments: Bright pink chalky massive montmorillonite. Location: Tamminen Quarry, Greenwood, Oxford County, Maine, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Montroseite: (V+++,Fe+++,V++++)O(OH)
Comments: Black silky fibrous montroseite on sandstone with tyuyamunite. Location: Monument No. 2 Mine, Kayenta, Apache County, Arizona, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Montroyalite: Sr4Al8(CO3)3(OH,F)26·10-11(H2O)
Comments: Translucent micro spherical montroyalite on matrix. Location: Francon Quarry, Montreal, Quebec, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Montroydite: HgO
Comments: Red to orange radial and crystalline montroydite aggregates on black calcite. Location: Terlingua, Brewster County, Texas, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Montroydite: HgO Pinchite: Hg++5O4Cl2
Comments: Minute lustrous black pinchite crystals on white montroydite. Location: Terlingua, Brewster County, Texas, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Mooihoekite: Cu9Fe9S16
Comments: Lighter toned brassy metallic mooihoekite masses in chalcopyrite with magnetite. Location: Oktyabr'skoye Mine, Norilsk, Krasnoyarsk Territory, Siberia, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Mooihoekite: Cu9Fe9S16 Haycockite: Cu4Fe5S8
Comments: B&W polished section image of mooihoekite-haycockite intergrowth showing tarnished mooihoekite (mh) and haycockite (hc). The small whitest lamellar grains are mackinawite. Location: Hortonolite dunite (replacement,) pegmatite, Mooihoek Farm, Lydenburg District, Transvaal, South Africa. (AmMin, v57:689). Scale: See Image. © American Mineralogist
Moolooite: Cu++(C2O4)·n(H2O) (n < 1)
Comments: Light bluish moolooite encrustation. Location: Ibergstausee, Stempeda, Südharz, Thuringia, Germany. Scale: Picture size 0.9 mm. © Thomas Witzke / Abraxas-Verlag
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
Moorhouseite: (Co,Ni,Mn)SO4·6(H2O)
Comments: Pink crystalline moorhouseite in sandstone. Location: Cameron, Coconino County, Arizona, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species