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Montgomeryite Field of view: 2 mm Locality: Iron Monarch Mine, South Australia Mineral

Montgomeryite

montgomeryite

Formula
Ca4MgAl4(PO4)6(OH)4 * 12H2O
Monticellite Locality: Crestmore quarries, Crestmore, Riverside Co., California (Locality at mindat.org) A rich specimen with sharp, freestanding monticellite crystals to over 1 cm, perched on semilustrous brown vesuvianite (idocrase) crystals. Al Ordway self-collected this in 1974. This lcoale produced superb examples of the species, very rare elsewhere. Few pieces I have seen are so large and displayable as this. 8.4 x 5.7 x 2.5 cm. Mineral

Monticellite

monticellite

Formula
CaMgSiO4
Montmorillonite, Quartz Locality: White Queen Mine, Hiriart Mountain (Heriart; Heriot; Hiriat Hill), Pala District, San Diego County, California, USA (Locality at mindat.org) Size: miniature, 6.5 x 5 x 4 cm Quartz included by Montmorillonite ps. after (?) A VERY interesting and to my knowledge unique specimen featuring a fanspray of elongated pink crystals INSIDE a quartz point. The crystals inside have been shown to be Montmorillonite but the form is wrong because the mineral usually is amorphous from the locality, indicating they are a replacement after another, as yet-unidentified mineral species. From Tim Sherburn, who got it from dealer Mark Rodgers in 1984. Note that the front has been polished to enhance display of the inclusion (and the piece is a quartz shard, anyhow)6.5 x 5 x 4 cm Mineral

Montmorillonite

montmorillonite

Formula
(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 * nH2O
Mohs
1.3
Mineral

Montpelvouxite

montpelvouxite

Formula
AgPb16Sb27As18S84
Montroseite Locality: Prachovice, Pardubice Region, Bohemia (Böhmen; Boehmen), Czech Republic Black shiny Montroseite crystals from Prachovice. Specimen size 6x4cm. Specimen and photo Leon Hupperichs. Mineral

Montroseite

montroseite

Formula
(V³⁺,Fe²⁺,V⁴⁺)O(OH)
Mineral

Montroyalite

montroyalite

Formula
Sr4Al8(CO3)3(OH,F)26 * 10-11H2O
Montroydite Locality: Mariposa Mine (California Mountain Mine), Terlingua District, Brewster County, Texas, USA (Locality at mindat.org) Size: thumbnail, 2.7 x 2.2 x 1.5 cm Montroydite A VERY RICH and unusually large specimen of montroydite, a rare Terlingua mercury mineral! The piece has a thick vein running through it, and is rich with microcrystals on attractive contrasting calcite. The dark red is the montroydite and the orange mineral is kleinite. Edgar Bailey was a noted mineralogist and field collector of Terlingua minerals, and the species Edgarbaileyite is named after him in honor. This is from his collection and was self-collected by him, part of a suite of such pieces (not from Feinglos coll.) Mineral

Montroydite

montroydite

Formula
HgO
Mohs
2.5
Mineral

Mooihoekite

mooihoekite

Formula
Cu9Fe9S16
Mohs
4
Moolooite Locality: Sarbaiskoe deposit (Sarbai; Sarbay Mine), Qostaney Oblysy (Kostanai "Kustany" Oblast'), Kazakhstan (Locality at mindat.org) Blue massive Moolooite (analysed). Field of view 12 mm. Specimen and photo Leon Hupperichs. Mineral

Moolooite

moolooite

Formula
Cu(C2O4)·nH2O
Mineral

Mooreite

mooreite

Formula
Mg9☐2Mn2Zn4(SO4)2(OH)26 * 8H2O
Mineral

Moorhouseite

moorhouseite

Formula
Co(SO4)(H2O)6
Mopungite Locality: Green prospect, Lake District, Churchill Co., Nevada, USA White crust of Mopungite on Stibnite. Field of view 15 mm. Specimen and photo Leon Hupperichs. Mineral

Mopungite

mopungite

Formula
Na[Sb⁵⁺(OH)6]
Moraesite Locality: Linópolis, Divino das Laranjeiras, Doce valley, Minas Gerais, Southeast Region, Brazil (Locality at mindat.org) Field of view 7 mm. Depth of field is achieved with CombineZM. Specimen and photo Leon Hupperichs. Mineral

Moraesite

moraesite

Formula
Be2PO4(OH)·4H2O
Mineral

Moragite

moragite

Formula
Ca3TiSi2(Al2Si)O14
Mineral

Moraskoite

moraskoite

Formula
Na2Mg(PO4)F
Mordenite Locality: Old Broken Hill Road, Coromandle Peninsula, New Zealand Size: miniature, 4.4 x 3 x 3 cm Mordenite This 2 cm vug is completely filled with gorgeous .25 cm sprays of ultra-fine and lustrous needles of this uncommon zeolite in fine quality. Exact location if Broken Hill Road. Ex. Martin Lewadny Collection. Mineral

Mordenite

mordenite

Formula
(Na2,Ca,K2)4(Al8Si40)O96·28H2O
Moreauite Locality: Valdeíñigos, Tejeda de Tiétar, Cáceres, Extremadura, Spain Field of View: 1 mm Yellow crystal aggregates of Moreauite. Species confirmed by XRD, electron microprobe and Raman spectroscopy. Mineral

Moreauite

moreauite

Formula
Al3(UO2)(PO4)3(OH)2 * 13H2O
Light yellow to grey vitreous greasy crystals of the extremely rare Ca-Ba arsenate mineral morelandite the from type and only known locality worldwide in Jakobsberg mine (Jakobsberg Mine, Nordmark, Filipstad, Värmland County, Sweden). Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Morelandite

morelandite

Formula
Ca2Ba3(AsO4)3Cl
Green crystal aggregates of the nickel sulphate mineral morenosite from a locality in Canada (Worthington Mine, Drury Township, Sudbury District, Ontario, Canada). Mineral

Morenosite

morenosite

Formula
NiSO4·7H2O
Mineral

Morimotoite

morimotoite

Formula
Ca3(Ti,Fe²⁺,Fe³⁺)2((Si,Fe³⁺)O4)3
Mohs
7.5
Locality: Viitaniemi pegmatite, Eräjärvi area, Orivesi, Western and Inner Finland Region, Finland Pink morinite on backlight. Image width 18 mm. Mineral

Morinite

morinite

Formula
NaCa2Al2(PO4)2(OH)F4·2H2O
Mineral

Morleyite

morleyite

Formula
Ag2CuPb25Sb24As4S68.5
Mineral

Morningstarite

morningstarite
Mineral

Morozeviczite

morozeviczite

Formula
(Pb,Fe)3Ge1-xS4
Mohs
3.5