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Minerals

6323 results

Mineral

Magnesiohögbomite-2N2S

magnesiohögbomite-2N2S
Mineral

Magnesiohögbomite-2N3S

magnesiohögbomite-2N3S

Formula
[(Mg,Fe²⁺,Zn)4(Al,Ti,Fe³⁺)10O19(OH)]2
Mineral

Magnesiohögbomite-2N4S

magnesiohögbomite-2N4S

Formula
[(Mg8.43Fe²⁺1.57)Σ=10Al22Ti⁴⁺2O46(OH)2]
Mineral

Magnesiohögbomite-6N12S

magnesiohögbomite-6N12S
Mineral

Magnesiohögbomite-6N6S

magnesiohögbomite-6N6S

Formula
[(Mg,Fe²⁺)3(Al,Ti,Fe³⁺)8O15(OH)]6
:Locality: Torrecillas Mine, Salar Grande, Iquique, Tarapacá Region, Chile Size: 3.7 × 3 × 1.8 cm Description: Really interesting sample of canutite, a rare sodium and manganese arsenate, formed by several groups of brilliant, transparent and brown color crystal aggregates. They are accompanied by light blue lavendulan, cubic crystals of halite and pinkish magnesiokoritnigite. Canutite and magnesiokoritnigite have the Type Locality in this mine (rather number of small prospects), close to magnesiocanutite that is visually not distinguishable from canutite. A complete and representative specimen. Mineral

Magnesiokoritnigite

magnesiokoritnigite

Formula
Mg(AsO3OH)·H2O
Yellow green crystals of the new mineral magnesioleydetite (IMA 2017-063) intermixed with also yellow green crystals of the also new mineral strassmannite, (IMA 2017-086). Analyzed specimen, see copy enclosed. Acicular white mineral associated is pickeringite. From: Widowmaker Mine, Fry Mesa, White Canyon, San Juan County, Utah, United States of America. Mineral

Magnesioleydetite

magnesioleydetite

Formula
Mg(UO2)(SO4)2·11H2O
Small brown crystal aggregates of the rarest member of the neptunite group, magnesioneptunite, from the type and only known locality worldwide in Lakargi Mountain ( Lakargi Mountain, Upper Chegem Caldera, Baksan Valley, Kabardino-Balkaria, Russian Federation). Ex. Erich Laskowski collection (USA). Mineral

Magnesioneptunite

magnesioneptunite

Formula
KNa2Li(Mg,Fe)2Ti2Si8O24
Mineral

Magnesionigerite-2N1S

magnesionigerite-2N1S

Formula
(Mg,Al,Zn)2(Al,Sn)6O11(OH)
Mineral

Magnesionigerite-6N6S

magnesionigerite-6N6S

Formula
(Mg,Al,Zn)3(Al,Sn,Fe)8O15(OH)
Magnesiopascoite Locality: Blue Cap Mine, La Sal Creek Mining District, San Juan County, Utah, USA Field of view 4 mm. Ex Joe Marty specimen. Mineral

Magnesiopascoite

magnesiopascoite

Formula
Ca2Mg(V10O28)·16H2O
Mohs
2.5
Colour
orange
Mineral

Magnesioqingheiite

magnesioqingheiite

Formula
Na2Mg(MgAl)(PO4)3
Mineral

Magnesiorowlandite-(Y)

magnesiorowlandite-(Y)

Formula
Y4(Mg,Fe)(Si2O7)2F2
Yellow crystal aggregates of the rare mineral magnesiostaurolite in a white contrasting matrix. From: Case Parigi, Po Valley, Dora Maira Massif, Piedmont, Italy. Mineral

Magnesiostaurolite

magnesiostaurolite

Formula
Mg(Mg,Li)3(Al,Mg)18Si8O44(OH)4
Magnesiotaaffeite-2N'2S Locality: Ratnapura, Ratnapura District, Sabaragamuwa Province, Sri Lanka (Locality at mindat.org) Taaffeeite was an odd story - a gem crystal species first identified from gem rough material, rather than from a crystal. It was a long time before anybody found a crystal to work with, and today they are still extremely rare, probably the rarest and most desirable of the various gem species found in Sri Lanka. This remarkable floater, complete hexagonal crystal is considered by the gem trade experts , Bill Pinch, and others to whom i showed it at Tucson to to be the world's best yet known for species. It would also cut one of the largest known stones and perhaps the best, as it has good uniform purple color. Most specimens are tiny broken chunks, or the occasionally fine transparent crystal with SOME faces. This is COMPLETE all around. It is so remarkable, it is off the charts. The crystal's rear face was polished slightly for a refractive index test , just to be sure of its verification (this is an important test for the species). 1.3 x 1.3 x 0.6 cm , 9.63 carats This Photo was Mindat.org Photo of the Day - 4th Oct 2008 Mineral

Magnesiotaaffeite-2N'2S

magnesiotaaffeite-2N'2S

Formula
Mg3BeAl8O16
Mohs
8
Colour
white, green
Colorles to pale shades of olive-green crystal aggregates of magnesiotaaffeite-6N’3S in a specimen from a locality in Antarctica (Khmara Bay, Casey Bay, Enderby Land, Eastern Antarctica, Antarctica). Ex Vandenbroucke Museum collection from Waregem, Belgium Mineral

Magnesiotaaffeite-6N'3S

magnesiotaaffeite-6N'3S

Formula
Mg2BeAl6O12
Mineral

Magnesiovesuvianite

magnesiovesuvianite

Formula
Ca19Mg(Al10Mg2)(Si2O7)4(SiO4)10(OH)10
Voltaite-group minerals: (d) SE image of magnesiovoltaite from Shiveluch, sample Shiv-8030. Mineral

Magnesiovoltaite

magnesiovoltaite

Formula
K2Mg5Fe³⁺3Al(SO4)12*18H2O
Mineral

Magnesiozippeite

magnesiozippeite

Formula
Mg(UO2)2(SO4)O2 * 3.5H2O
Magnesite - Monocristal Size : 9.7x7.1x6 cm Locality : Serra das Éguas, Brumado (Bom Jesus dos Meiras), Bahia, Northeast Region, Brazil Mineral

Magnesite

magnesite

Formula
MgCO3
Group of rhombododecahedral {110} magnetite crystals with octahedral {111} pyrite Locality : Brosso Mine, Cálea, Léssolo, Canavese District, Torino Province, Piedmont, Italy Size : 11.2x7.9x4.2 cm - xls Magnetite 1.6 cm; xls Pyrite1.9 cm - Specimen mined year 1979 Salvere section. Mineral

Magnetite

Formula
Fe3O4
Mohs
5.5–6.5
Colour
Black
Black crystals of the rare lead mineral magnetoplumbite from Langban (Sweden). Mineral

Magnetoplumbite

magnetoplumbite

Formula
PbFe³⁺12O19
Mineral

Magnioursilite

magnioursilite

Formula
Mg4(UO2)4(Si2O5)5(OH)6·20H2O
Creamy white microcrystals of the extremely rare Hg tellurite mineral magnolite from Mountain Lion Mine (Magnolia District, Boulder County, Colorado, United States of America) a locality close to the TL, associated to minoritary coloradoite. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Magnolite

magnolite

Formula
Hg¹⁺2Te⁴⁺O3