Mineral Specimen Images (M)

Moncheite: (Pt,Pd)(Te,Bi)2  
Insizwaite: Pt(Bi,Sb)2

Comments: Back-scattered electron image showing b) intergrowth of taimyrite-tatyanaite with moncheitei-insizwaite (CanMin, v 42, p 611).
Location: Kondyor PGE placer, Khabarovskiy Kray, eastern Siberia, Russia. Scale: See Image.
© Canadian Mineralogist

Monetite: CaHPO4  
Newberyite: Mg(PO3OH)·3(H2O)

Comments: Tan coatings of monetite on white newberyite pseudomorphous after struvite crystal.
Location: Mono Lake, Mono County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Mongolite: Ca4Nb6Si5O24(OH)10·5(H2O)

Comments: White to pinkish massive mongolite.
Location: Khan-Bogdinskii massif, Gobi Desert, Mongolia. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Monimolite: (Pb,Ca)2Sb2O7

Comments: Pale green monimolite crusts on matrix.
Location: Altar, Sonora, Mexico. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Monohydrocalcite: CaCO3·(H2O)

Comments: Gray to pale blue, due to copper staining, botryoidal monohydrocalcite crust.
Location: 40' level, Saint Pierre Mine, Sainte-Marie-aux-Mines, Vosges Mountains, Haute-Rhin, France. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Montanite: Bi2Te++++++O6·2(H2O)

Comments: Grayish-green montanite grain in matrix.
Location: Zupkov (Zsubko; Schubkau), Stredoslovenský Kraj, Slovak Republic. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Montdorite: (K,Na)(Fe++,Mn++,Mg)2.5[Si4O10](F,OH)2

Comments: Pale green fine granular montdorite in iron-stained matrix.
Location: Charlunnes, Mont Dore, Puy-de-Dome, France. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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

Montmorillonite: (Na,Ca)0,3(Al,Mg)2Si4O10(OH)2·n(H2O)

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