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Minerals

6323 results

Mineral

Marianoite

marianoite

Formula
Na2Ca4(Nb,Zr)2(Si2O7)2(O,F)4
Maricopaite Locality: Moon Anchor Mine (Aggravation Mine; East Vulture Mining Co. Mine), Hummingbird Spring, Osborn District, Big Horn Mts, Maricopa Co., Arizona, USA Field of view 4 mm. Specimen and photo Leon Hupperichs. Mineral

Maricopaite

maricopaite

Formula
Ca2Pb7(Si36Al12)O99·n(H2O,OH)
Mariinskite grains (green) in the matrix of mica chromite. The photo size is 2 mm by the base, polished section. The image is published in an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Mineral

Mariinskite

mariinskite

Formula
BeCr2O4
Mohs
8.5
Mineral

Marinaite

marinaite

Formula
Cu2Fe³⁺O2(BO3)
Marinellite Locality: Magliano Romano, Rome Province, Latium, Italy Blue crystalline Marinellite. Field of view 4 mm. Specimen and photo Leon Hupperichs. Mineral

Marinellite

marinellite

Formula
(Na,K)42Ca6(Al6Si6O24)6(SO4)8Cl2 * 3H2O
Marioantofilliite, as blue globular aggregates on allophane (a), in some cases associated with greenish crystalline globular aggregates of malachite (b). The SEM pictures show the morphology of marioantofilliite aggregates (c) and crystals (d). Symbols: Alp is allophane; Maf is marioantofilliite. Monte Copello–Reppia, Graveglia Valley, Ne, Genoa Province, Liguria, Italy. Type material, Natural History Museum of the University of Pisa. Mineral

Marioantofilliite

marioantofilliite

Formula
[Cu4Al2(OH)12](CO3)·3H2O
Marićite Locality: Big Fish River, Dawson Mining District, Yukon Territory, Canada Original description: ~10 cm. crystal spray, on display at the Royal Ontario Museum, Toronto, Canada. Mineral

Marićite

marićite
Mineral

Markascherite

markascherite

Formula
Cu3(MoO4)(OH)4
Mineral

Markcooperite

markcooperite

Formula
Pb2(UO2)TeO6
Mineral

Markeyite

markeyite

Formula
Ca9(UO2)4(CO3)13·28H2O
Mineral

Markhininite

markhininite

Formula
TlBi(SO4)2
Mineral

Marklite

marklite

Formula
Cu5(CO3)2(OH)6 * 6H2O
Back-scattered electron image of the markwelchite-containing polished section. Small grains of markwelchite (Mrw) occur in the brighter regions, closely associated with protochabournéite. Holotype specimen 3739/I. Mineral

Markwelchite

markwelchite

Formula
TlPbSbS3
Black sharp crystal of marokite from Morocco (Tachgagalt Mine, Ouarzazate Province, Drâa-Tafilalet Region, Morocco) in matrix. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Marokite

marokite

Formula
CaMn³⁺2O4
Galena, Marrite Locality: Lengenbach Quarry, Im Feld (Imfeld; Feld; Fäld), Binn Valley, Wallis (Valais), Switzerland (Locality at mindat.org) Size: miniature, 4.1 x 2.2 x 1.9 cm Marrite with Galena ex. Dr. Mark Feinglos Collection A validated specimen of this ultra-rare silver-lead-arsenic sulfide species from Lengenbach. Mark exchanged it from Dr. Jaroslav Hyrsl who in turn obtained it in trade from the Natural History Museum in Bern, Switzerland, in about 1995. Although microcrystalline, the specimen has some display value - more than most such. The two arrows point to the marrite microxls (one or two at each arrow). The rest is galena. The marrite is dull on the surface, as opposed to the galena, which is bright. Really microscope stuff, but very rare, and a silver mineral, so likely of interest to some folks. (TYPE LOCALITY) Mineral

Marrite

marrite

Formula
AgPbAsS3
Mineral

Marrucciite

marrucciite

Formula
Hg3Pb16Sb18S46
Mineral

Marsaalamite-(Y)

marsaalamite-(Y)

Formula
Y(MoO4)(OH)
Exceptionally well crystallized specimen of the very rare copper iodide marshite(CuI) from this already famous Russian deposit: Rubtsovskoe Deposit, Altaiskii Krai, Western Siberia, Russian Federation. Marshite occurs as complex beige crystals in a contrasting brown matrix. For an excellent review on the locality see the Mineralogical Record Vol.45, nº4, July-August 2014 article, where it tells that the marshite occurrence inside the mine was only 6 m long ! (p.409). In addition, the Munich Show report in the Mineralogical Record (Vol.46, num 1, 2015, p.168) tells that "all mining of ore has been ceased, this great locality has reached the end of the line". For this reason, future discoveries of marshite is probably unlikely Mineral

Marshite

marshite

Formula
CuI
Mohs
2.5
Marsturite Locality: Molinello Mine, Graveglia Valley, Ne, Genova Province, Liguria, Italy (Locality at mindat.org) Orange xls of Marsturite, field of view is 5 mm. Depth of field is achieved with CombineZM. Specimen and photo Leon Hupperichs. Mineral

Marsturite

marsturite

Formula
NaCaMn3Si5O14(OH)
Marthozite Locality: Musonoi Mine, Kolwezi, Western area, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre) (Locality at mindat.org) Size: small cabinet, 6.2 x 5.3 x 4.0 cm Marthozite Superb, unusually large marthozite crystals to 4.5 mm (twinned?) in a protective vug! Mineral

Marthozite

marthozite

Formula
Cu²⁺(UO2)3(SeO3)2O2 * 8H2O
Mohs
6
White crystals of the very rare Ba zeolite mineral martinandresite (IMA 2017-038) from the type and only known locality worldwide: Isenwegg, Wasen Alp, Simplon Pass, Brig, Wallis, Switzerland. Type material from the original find in 1989. Mineral

Martinandresite

martinandresite

Formula
Ba2(Al4Si12O32)·10H2O
Martinite Locality: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada Original description: The maximum diameter is ~ 2 1/4 mm. Via Jean-Pierre Beckerich. Found August 1992. Fairly deep to very pale violet plates of martinite. This specimen was visually confirmed (as MSH UK92) by the principal author (Dr. A. M. McDonald 2007). It is considered a very good example for the species. The martinite is from a sodalite xenolith and appears to be associated with yofortierite. According to Horváth (Lapis, Rivista 7-8/2000), yofortierite is exceedingly rare in this environment but tuperssuatsiaite has not been reported. The other (equally rare) possibility is raite – but I doubt it. Other associated minerals inlude well formed "eudialyte". Mineral

Martinite

martinite

Formula
(Na,☐,Ca)12Ca4(Si,S,B)14B2O38(OH,Cl)2F2·4H2O
Mohs
4
Mineral

Martyite

martyite

Formula
Zn3V2O7(OH)2·2H2O
Mineral

Marumoite

marumoite

Formula
Pb32As40S92