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Weinrich Minerals, A Dealer in Fine Mineral Specimens - Since 1989. We buy collections and single high quality specimens.

John Betts - Fine Minerals, New York. Dealers of Fine Minerals and Natural Crystal Clusters since 1989. We buy rock collections, we buy gem collections, we buy mineral collections.

McDougall Minerals sells high-quality mineral specimens from all over the world to collectors of all levels, from beginners to connoisseurs

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's Image Gallery With 4041 Images

Marianoite Image

Images:

Marianoite: Na2Ca4(Nb,Zr)2(Si2O7)2(O,F)4

Comments: PPL image of euhedral crystals of marianoite, titanite and U-rich pyrochlore in the phlogopite-calcite silicocarbonatite. (CanMin, v46:1023).
Location: Mesoproterozoic Prairie Lake intrusive complex, in northwestern Ontario, Canada. Scale: See Image.
© Canadian Mineralogist

Marianoite Image

Images:

Marianoite: Na2Ca4(Nb,Zr)2(Si2O7)2(O,F)4

Comments: SEM images showing the morphology of marianoite crystals, (CanMin, v46:1023).
Location: Mesoproterozoic Prairie Lake intrusive complex, in northwestern Ontario, Canada. Scale: See Images.
© Canadian Mineralogist

Maricite Image

Images:

Maricite: NaFe++PO4
Vivianite: Fe++3(PO4)2·8(H2O)

Comments: Brown maricite nodule with internal radiating structure, with blue vivianite.
Location: Big Fish River, Yukon Territory, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Maricopaite Image

Images:

Maricopaite: Pb7Ca2(Si,Al)48O100·32(H2O)

Comments: Opaque white prismatic maricopaite microcrystals and yellow crystalline mimetite.
Location: Moon Anchor Mine, near Tonopah, Maricopa County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Marinellite Image

Images:

Marinellite: [(Na,K)42Ca6](Si36Al36O144)(SO4)8Cl2·6(H2O)

Comments: Colorless to pale bluish-gray anhedral marinellite crystal.
Location: Monte Cavalluccio, Sacrofano, Campagnano di Roma, Italy. Scale: See Image.
© Rruff Database

Marokite Image

Images:

Marokite: CaMn+++2O4

Comments: Dark brown crystalline massive marokite.
Location: vein #2, Tachgagalt, Ouarzazet, Morocco. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Marrite Image

Images:

Marrite: PbAgAsS3

Comments: A prismatic crystal of marrite with small rounded crystals of galena in quartz.
Location: Lengenbach quarry, Binntal, Wallis (Valais), Switzerland. Scale: Picture size 1.3 mm.
© Thomas Witzke / Abraxas-Verlag

Marrite Image

Images:

Marrite: PbAgAsS3
Jordanite: Pb14(As,Sb)6S23

Comments: Aggregate of gray prismatic crystals of marrite on fine-grained jordanite.
Location: Lengenbach quarry, Binntal, Valais, Switzerland. Scale: Picture high 5 mm.
© Walter Gabriel

Marrucciite Image

Images:

Marrucciite: Hg3Pb16Sb18S46

Comments: Black, acicular crystals of marrucciite embedded in dolomite marble..
Location: Buca della Vena Mine, Stazzema, Tuscany, Italy.. Scale: Picture size 4 mm.
© Thomas Witzke

Marshite Image

Images:

Marshite: CuI

Comments: Translucent tetragonal crystal of marshite on matrix.
Location: Broken Hill, New South Wales, Australia. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Marsturite Image

Images:

Marsturite: NaCaMn3[Si5O14(OH)]

Comments: Orange scaly marsturite on matrix.
Location: Molinello Mine, Val Graveglia, Genoa, Liguria, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Marthozite Image

Images:

Marthozite: Cu[(UO2)3(SeO3)2O2]·8(H2O)

Comments: Yellowish green coating of marthozite on matrix.
Location: Musonoi Mine, Katanga, Democratic Republic of the Congo. Scale: Not Given.
© John Veevaert

Marthozite Image

Images:

Marthozite: Cu[(UO2)3(SeO3)2O2]·8(H2O)

Comments: Olive green crystal of marthozite showing multiple face development on main crystal. Schumacher Collection.
Location: Musonoi Mine, Kolwezi, Western area, Shaba Cu belt, Shaba (Katanga), Congo (Zaïre). Scale: Picture size 5 mm.
© Paul M. Schumacher

Martinite Image

Images:

Martinite: (Na,[ ],Ca)12Ca4(Si,S,B)14B2O38(OH,Cl)2F2·4(H2O)

Comments: Colorless, pseudohexagonal plate of martinite associated with sodalite and a clinoamphibole. (CanMin, v45:1281).
Location: Poudrette quarry, Mont Saint-Hilaire, Quebec, Canada. Scale: Crystal size 40 µm.
© Canadian Mineralogist

Martyite Image

Images:

Martyite: Zn3V2O7(OH)2·2H2O

Comments: Clusters of yellow flakes and coarser red-orange plates of martyite on V-U replacement of organic material.
Location: Blue Cap mine, near La Sal, San Juan County, Utah, USA. Scale: Picture size 1.4 mm.
© Canadian Mineralogist

Mascagnite Image

Images:

Mascagnite: (NH4)2SO4

Comments: White, botryoidal mascagnite.
Location: Carola Mine, Freital, Dresden, Saxony, Germany. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Mascagnite Image

Images:

Mascagnite: (NH4)2SO4
Lecontite: (NH4,K)Na(SO4)·2(H2O)

Comments: SEM BSE image of fine-grained lecontite (Le) and thenardite, occupying the space between mascagnite (M) crystals. CanMin 47:573.
Location: Coal-waste heap in Avion, northern France, that has been undergoing subsurface combustion for several decades. Scale: See Image.
© Canadian Mineralogist

Maslovite Image

Images:

Maslovite: PtBiTe
Froodite: PdBi2
Altaite: PbTe

Comments: Reflected light photomicrograph of maslovite (M), froodite (F), and altaite (A), in chalcopyrite matrix.
Location: Oktyabr'skoye Mine, Norilsk, Krasnoyarsk Territory, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Massicot Image

Images:

Massicot: PbO

Comments: Small nugget of reddish-yellow massicot.
Location: Wytheville, Wythe Co., Virginia, USA. Scale: 18x10x5 mm.
© John Betts - Fine Minerals

Massicot Image

Images:

Massicot: PbO
Litharge: PbO

Comments: Dark red litharge with brownish-yellow scaly massicot and white cerussite.
Location: Patagonia, Santa Cruz County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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