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Melanotekite: Pb2Fe+++2Si2O9
Comments: Black metallic granular melanotekite with reddish brown andradite. Location: Langban, Varmland, Sweden. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Melanothallite: Cu2OCl2 Chloromenite: Cu9O2(SeO3)4Cl6
Comments: Olive green crystalline chloromenite on blue-green melanothallite. Location: North Break, Second Cone of main fracture eruption, Tolbachik Volcano, Kamchatka District, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Melanothallite: Cu2OCl2
Comments: Bluish green melanothallite grain. Location: North Break, Second Cone, Main Eruption Site, Tolbachik, Kamchatka District, Russian Far East, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Melanovanadite: CaV++++2V+++++2O10·5(H2O)
Comments: Dark greenish-black fine-grained massive melanovanadite. Location: Minas Ragra, near Cerro de Pasco, Junin, Peru. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Melanterite: Fe++SO4·7(H2O)
Comments: Deep greenish blue encrustation of melanterite. The pistanite variety is copper-bearing where Cu replaces some of the Fe in the crystal structure. Location: Patagonia District, Arizona, USA. Scale: 5 x 9.5 cm. © John Veevaert
Melilite: (Ca,Na)2(Al,Mg,Fe++)(Si,Al)2O7
Comments: Barrel-shaped root-beer colored melilite crystal with clear nepheline. Location: Udersdorf, Rhineland-Palatinate, Germany. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Melilite: (Ca,Na)2(Al,Mg,Fe++)(Si,Al)2O7 Monticellite: CaMgSiO4
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
Meliphanite: (Ca,Na)2Be[(Si,Al)2O6(F,OH)]
Comments: Honey yellow, translucent sample of Meliphanite. Location: Aroy, Langesundsfjorden, Norway. Scale: 3.6 X 5.3 cm. © John Veevaert
Melliniite: (Ni,Fe)4P Kamacite: alpha-(Fe,Ni)
Comments: Reflected-light image displaying an anhedral fragment of creamy-yellowish melliniite(1) associated with kamacite (2). AmMin, v91, p453. Location: Northwest Africa 1054 acapulcoite. Scale: See Image. © American Mineralogist
Melliniite: (Ni,Fe)4P Nickelphosphide: (Ni,Fe)3P
Comments: Reflected light image of creamy-yellowish melliniite (1) and nickelphosphide (3). AmMin, v91, p453. Location: Northwest Africa 1054 acapulcoite. Scale: See Image. © American Mineralogist
Mellite: Al2[C6(COO)6]·16(H2O)
Comments: Specimen of crystalline mellite. Mellite is a naturally occurring organic mineral species. Location: Csordakhut, Tatabanya, Hungary. Scale: 4 x 3 cm. © John Veevaert
Melonite: NiTe2
Comments: Metallic foil of melonite. Location: Cresson Mine, Cripple Creek, Teller County, Colorado, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Mendipite: Pb3Cl2O2 Crednerite: CuMnO2
Comments: Sooty, deep-black, granular to platy crednerite with mendipite. Location: Mendip Hills, Somerset, England. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
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