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Minerals

6323 results

Mineral

Joesmithite

joesmithite

Formula
PbCa2(Mg3Fe³⁺2)(Be2Si6)O22(OH)2
Mohs
5.5
Colour
black
Johachidolite Locality: Pein Pyit (Painpyit), Mogok, Sagaing District, Mandalay Division, Burma (Myanmar) (Locality at mindat.org) Size: 3.5 x 3.0 x 1.6 cm. Johachidolite is a calcium aluminum borate and this specimen is an incredible rarity of size and stature that makes it among the more important rare species specimens from this part of the world. This crystal is exceptionally large. Ex. William Larson Collection. Mineral

Johachidolite

johachidolite

Formula
CaAlB3O7
Johanngeorgenstadtite (pink orange) with aerugite (green) and xanthiosite (yellow) on holotype specimen (AMNH 17956); FOV 0.56 mm across. 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

Johanngeorgenstadtite

johanngeorgenstadtite
Johannite Locality: Malwine Shaft, Frohnau, Annaberg-Buchholz, Erzgebirge, Saxony, Germany (Locality at mindat.org) Size: thumbnail, 3.5 x 2 x 1.7 cm Johannite This is simply oustanding for the species, among the very best i am told. It is also quite beautiful! Johannite is a very rare uranium mineral Mineral

Johannite

johannite

Formula
Cu(UO2)2(SO4)2(OH)2·8H2O
Mohs
2
Johannsenite Locality: North Mine (North Broken Hill Mine; NBH Mine), Broken Hill, Yancowinna County, New South Wales, Australia (Locality at mindat.org) Size: 5.5 x 4.5 x 3.3 cm. Johannsenite is a rare pyroxene group silicate and this fine, very rich specimen features huge, blocky, highly lustrous, olive-green crystals to 1.2 cm on matrix. This is also a rare and exceptional locality piece from the North Mine at Broken Hill, Australia. Ex. T.M. Phetteplace and Jaime Bird Collections. Mineral

Johannsenite

johannsenite

Formula
CaMn²⁺Si2O6
Mohs
6
Johillerite Locality: Second scoria cone, Northern Breakthrough (North Breach), Great Fissure eruption (Main Fracture), Tolbachik volcano, Kamchatka Oblast', Far-Eastern Region, Russia Field of view 4 mm. Mineral

Johillerite

johillerite

Formula
NaCuMg3(AsO4)3
Mohs
3
:Agregados en abanico de cristales de roweita, de color beige anaranjado, definidos, de buen tamaño y de calidad para la especie. La roweita es un borato de calcio y manganeso. Se acompañan de cristales prismáticos hexagonales de color blanco de johnbaumita de hasta 7 mm, excelentes también para la especie y muy poco habituales. La johnbaumita es un raro arseniato de calcio, el análogo arsenical del hidroxilapatito. En una matriz con verde andradita y cristales incoloros transparentes de pentahidroborita. Un ejemplar muy completo, con especies muy raras y bien cristalizadas. Medidas: 5.5 x 4.5 x 3.7 cm. Cristal principal: 1.5 cm (Roweite)/ 7 mm (Johnbaumite) Encontrado en 2017. Localidad: Shijiangshan mine, Linxi, Linxi Co., Ulanhad League, Inner Mongolia, China Mineral

Johnbaumite

johnbaumite

Formula
Ca5(AsO4)3OH
Mohs
4.5
Mineral

Johninnesite

johninnesite

Formula
Na2Mn²⁺9Mg7(OH)8[AsO4]2[Si6O17]2
Mineral

Johnjamborite

johnjamborite
Mineral

Johnkoivulaite-(Cs)

johnkoivulaite-(Cs)
Mineral

Johnsenite-(Ce)

johnsenite-(Ce)

Formula
Na12Ce3Ca6Mn3Zr3WSi25O73(CO3)(OH)2
Dark brown crystals of the rare phosphate mineral jonhsomervilleite from Minas Gerais (Sapucaia Mine, Sapucaia do Norte, Galiléia, Minas Gerais, Brazil). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Johnsomervilleite

johnsomervilleite

Formula
Na10Ca6Mg18Fe²⁺25(PO4)36
Mineral

Johntomaite

johntomaite
Brown single crystal aggregate of the extremely rare K-Mn-Nb phosphate mineral johnwalkite from the type and only known locality worldwide in South Dakota (Champion Mine, Keystone, Pennington County, South Dakota, United States of America). Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Johnwalkite

johnwalkite
Mineral

Joliotite

joliotite

Formula
(UO2)CO3·nH2O
Mineral

Jolliffeite

jolliffeite

Formula
NiAsSe
Colour
white
Mineral

Jonassonite

jonassonite

Formula
Au(Bi,Pb)5S4
Mineral

Jonesite

jonesite

Formula
KBa2Ti2(Si5Al)O18·nH2O
STEM images (bright field) of the extracted FIB lamella. Mineral

Jonlarsenite

jonlarsenite

Formula
Al4Cu9
Mineral

Joosteite

joosteite

Formula
Mn²⁺Mn³⁺O(PO4)
Mohs
4
Jordanite Locality: Segen Gottes Mine, Wiesloch, Baden-Württemberg, Germany Gray metallic jordanite in schalenblende. Field of view 2.5 cm. Specimen and photo Leon Hupperichs. Mineral

Jordanite

jordanite

Formula
Pb14(As,Sb)6S23
Mineral

Jordanówite

jordanówite

Formula
Zr(Ti³⁺Zr)Ti³⁺4AlO16
Mineral

Jordisite

jordisite

Formula
MoS2
Joséite Locality: Tazna Mine (Tasna Mine; Tazna-Rosario Mine), Cerro Tazna, Atocha-Quechisla District, Nor Chichas Province, Potosí Department, Bolivia (Locality at mindat.org) This is a downright incredible crystal of this exceptionally rare bismuth tellurium sulfide , from a relatively new locality for the species as brought to market recently by Alfredo Petrov (and the analysis was confirmed by Excalibur Mineral Co. as well as by Marcus Origlieri). These are the largest crysatls for the species, of good form, by far. This one, at 1.8 cm, ranks at the very top and is arguably the best single specimen from the lot in terms of both overall size AND the quality/completeness of crystal. Whether this was a onetime find, or whether the mine will produce more (though it hasn't done so in 50 years of mining....), who can say? But, i think it is safe to say that not many could be found, given the unusual nature and rarity of the mineral. 1.8 x 1.5 x 0.2 cm Mineral

Joséite-A

joséite-A

Formula
Bi4TeS2