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Minerals

6323 results

Mineral

Jahnsite-(Nafemg)

jahnsite-(NaFeMg)

Formula
NaFe³⁺Mg2Fe³⁺2(PO4)4(OH)2·8H2O
Mineral

Jahnsite-(Namnmg)

jahnsite-(NaMnMg)

Formula
{(Na,Ca)}{(Mn²⁺,Fe³⁺)}{(Mg,Fe³⁺)2}{Fe³⁺2}(PO4)4(OH)2(H2O)8
Mineral

Jahnsite-(Namnmn)

jahnsite-(NaMnMn)
Mineral assemblage and textural features of the studied grimmite-bearing sample on BSE images. Skutterudite (Sku) cut by a grimmite (Gr) veinlet containing abundant xenomorphic inclusions of jaipurite (J). 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

Jaipurite

jaipurite

Formula
CoS
SEM image of the crystals of verneite in association with fine-grained jakobssonite in the cotype sample from Eldfell." Image and caption taken from Balić-Žunić, T., Garavelli, A., Pinto, D. and Mitolo, D. (2018) Verneite, Na2Ca3Al2F14, a new aluminum fluoride mineral from Icelandic and Vesuvius fumaroles. Minerals: 8: 553-562. https://www.mdpi.com/2075-163X/8/12/553/pdf The article is open access, Creative Commons Attribution. From: Eldfell, Heimaey island, Vestmannaeyjar archipelago, Vestmannaeyjar, Southern Region, Iceland Mineral

Jakobssonite

jakobssonite

Formula
CaAlF5
Jalpaite Locality: Jalpa, Municipio de Jalpa, Zacatecas, Mexico (Locality at mindat.org) Size: miniature, 3.6 x 3.5 x 3.2 cm Jalpaite Jalpaite is a very rare species, and only a few large crystals are known to exist. This specimen, believed to have been found around the turn of the 1900s, is huge for the species. And, it is quite attractive. This crystal is pronounced to be the best of species, by those who have studied Mexican mineralogy far more than I. It comes from the type locality, and was passed down through several hands to Dr. Romero for his collection. This specimen from the Dr Miguel Romero collection was on loan exhibition to the University of Arizona Museum for over a decade, until my purchase of this collection in 2008. It was on display in special cases at the museum, and has since been featured in the book "The Miguel Romero Collection of Mexico Minerals" which we sponsored as a special supplement book (published by the Mineralogical Record in December of 2008). Mineral

Jalpaite

jalpaite

Formula
Ag3CuS2
Jamborite Locality: Halls Gap, Lincoln County, Kentucky, USA (Locality at mindat.org) Size: 4.1 x 3.5 x 2.9 cm. Jamborite is an ULTRA RARE alteration product of millerite, found in few localities worldwide. This showy and excellent geode has several vugs lined with yellow-green jamborite needles in pleasing association with quartz and dolomite. The richest and best vug is 9 mm across. Jamborite is a pseudomorph of millerite. VERY RARE! Ex. Carlton Davis collection. Mineral

Jamborite

jamborite

Formula
Ni(OH,S,O)2·nH2O
Jamesite Locality: Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia (Locality at mindat.org) Size: 4.3 x 3.5 x 2.8 cm. A specimen rich with small red microcrystals of the rare arsenate Jamesite, from the type locality, in veins mixed with duftite and on contrasting white dolomite. Mineral

Jamesite

jamesite

Formula
Pb2Zn(Fe²⁺,Zn)2Fe³⁺4(AsO4)4(OH)10
Mohs
3
Jamesonite with quartz Locality : Anita Mine - Huaron Peru - (View 4cm). Mineral

Jamesonite

jamesonite

Formula
Pb4FeSb6S14
Mohs
2.5
Really outstanding and very rich specimen of the very rare janchevite (IMA2017-079) from the famous Kombat deposit in Namibia. Dozens of crystals are present in the sample. Ex. Erich Laskowski collection (USA). Mineral

Janchevite

janchevite

Formula
Pb7V5+(O8.5☐0.5)Cl2
A black single crystal of the extremely rare mineral janggunite from the type locality: Janggun Mine, Bonghwa-gun, Gyeongsangbuk-do, Korea (Republic). Janggunite is a manganese mineral only known from three localities worldwide. Mineral

Janggunite

janggunite

Formula
(Mn⁴⁺,Mn²⁺,Fe³⁺)6O8(OH)6
Pale tan crystal aggregates of dalyite associated to very minoritary orange brown janhaugite. Both are very rare zirconium minerals. From: Gjerdingen, Nordmarka, Lunner, Oppland, Norway. Mineral

Janhaugite

janhaugite

Formula
(Na,Ca)3(Mn²⁺,Fe²⁺)3(Ti,Zr,Nb)2(Si2O7)2O2(OH,F)2
Black crystals of the extremely rare thallium mineral jankovicite in a matrix of realgar from a new find in Shimen, China (Jiepaiyu, Shimen County, Hunan Province, China), a locality that was only previously known for orpiment and realgar crystals. Mineral

Jankovićite

jankovićite
Mineral

Jarandolite

jarandolite

Formula
CaB3O4(OH)3
Outstanding sharp white jarlite crystals from the type locality and only one of the two known localities worldwide. After the label we know that it is exactly the variety metajarlite (a variety of jarlite containing some Mg, Ca, and Ba in substitution for Sr). From: Ivigtut, Ivittuut, Arsuk Fjord, Sermersooq, Greenland. Mineral

Jarlite

jarlite

Formula
Na2(Sr,Na)14Mg2Al12F64(OH,H2O)4
Mineral

Jarosewichite

jarosewichite

Formula
Mn2+3Mn3+(AsO4)(OH)6
Mohs
4
Jarosite Locality: Jaroso Ravine, Sierra Almagrera, Cuevas de Almanzora, Almería, Andalusia, Spain Picture width 2 mm. Collection and photograph Christian Rewitzer Mineral

Jarosite

jarosite

Formula
KFe³⁺3(SO4)2(OH)6
Metallic crystal aggregates of the very rare sulphide jaskolskiite from Vena Mines, Hammar, Askersund, Örebro County, Sweden. Ex Vandenbroucke Museum collection from Waregem, Belgium. Mineral

Jaskólskiite

jaskólskiite

Formula
CuₓPb2+ₓ(Sb,Bi)2-ₓS5 (x~0.2)
Mohs
4
Greenish crystal aggregates of jasmundite associated to mayenite from the famous Bellerberg (Bellerberg, Ettringen, Eifel Mountains, Rhineland-Palatinate, Germany). Mineral

Jasmundite

jasmundite

Formula
Ca11(SiO4)4O2S
Mineral

Jasonsmithite

jasonsmithite
Mineral

Jasrouxite

jasrouxite

Formula
Ag16Pb4(Sb25As15)S72
Mineral

Jaszczakite

jaszczakite

Formula
[Bi3S3][AuS2]
Mineral

Javorieite

javorieite

Formula
KFeCl3
Mineral

Jeanbandyite

jeanbandyite

Formula
Fe³⁺xFe²⁺1-xSn(OH)6-xOx