Mineral Specimen Images (J)

Jachymovite: (UO2)8(SO4)(OH)14·13(H2O)

Comments: Yellow crystals of jáchymovite.
Location: Jáchymov (St Joachimsthal), Krusné Hory (Erzgebirge), Západoceský Kraj, Bohemia, Czech Republic. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Jacobsite: (Mn++,Fe++,Mg)(Fe+++,Mn+++)2O4  
Barite: BaSO4

Comments: Sharp, octahedral crystals of Jacobsite on a bladed barite matrix.
Location: N' Chwaning II Mine, Kuruman, South Africa. Scale: 3x2.5x1.9 cm.
© Isaias Casanova / IC Minerals

Jacobsite: (Mn++,Fe++,Mg)(Fe+++,Mn+++)2O4  
Ganomalite: Pb9Ca5Mn++Si9O33

Comments: White crystalline ganomalite with dark granular jacobsite.
Location: Jacobsberg, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Jadarite: LiNaB3SiO7(OH)

Comments: Quarter section of drill core sample of white, massive jardarite.
Location: Jadar Basin, Serbia.. Scale: Sample Size 3 cm.
© Natrual History Museum

Jadeite: Na(Al,Fe+++)Si2O6

Comments: Fibrous crystals of Jadeite.
Location: Russian River, near Cloverdale, Mendocino County, California, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Jadeite: Na(Al,Fe+++)Si2O6  
Stronalsite: SrNa2Al4Si4O16

Comments: White stronalsite veinlets in massive pale green jadeite.
Location: Ohasa, Okayama, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Jagoite: (Pb,Na,Ca)3(Fe+++,Mg)Si3O10(Cl,OH)

Comments: Yellow crystalline fragment of jagoite in hausmannite.
Location: Langban, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Jagowerite: BaAl2(PO4)2(OH)2

Comments: Pale green to white massive jagowerite.
Location: Hess River, Yukon Territory, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Jagowerite: BaAl2(PO4)2(OH)2  
Penikisite: BaMg2Al2(PO4)3(OH)3

Comments: Light green crystal of jagowerite intergrown with darker green penikisite in a tetrahedrite (black) and white quartz matrix.
Location: From quartz veins cutting clays 26 km N of Hess River, Yukon Territory, Canada. Scale: Sample size 2x1 cm.
© Dave Barthelmy

Jagueite: Cu2Pd3Se4

Comments: Polished section (oil-immersion, plain polarized on left, cross-polarized on right) showing lobate grains of chrisstanleyite (Chr), replaced by jaguéite (Jag), with tiemannite (Tie). The jaguéite twinning is evident by banding in both images.
Location: El Chire prospect, Los Llantenes District of La Rioja Province, Argentina.. Scale: Picture size 150 µm.
© Canadian Mineralogist

Jahnsite-(CaMnFe): CaMn++Fe++2Fe+++2(PO4)4(OH)2·8(H2O)

Comments: Orange-brown microcrystalline jahnsite-(CaMnFe) associated with quartz.
Location: Voron'i Tundry, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: See Image.
© Rruff Database

Jahnsite-(CaMnMg): CaMnMg2Fe+++2(PO4)4(OH)2·8(H2O)

Comments: Brown, striated, transparent crystals of jahnsite-(CaMnMg) on matrix.
Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Jahnsite-(CaMnMn): CaMn++Mn++2Fe+++2(PO4)4(OH)2·8(H2O)

Comments: Brown grains of jahnsite-(CaMnMn) in matrix.
Location: Bendada Quarry, Belmonte, Beira Alta, Portugal. Scale: Picture size 1 cm.
© Tom Loomis / Dakota Matrix

Jahnsite-(MnMnMn): MnMnMn2Fe+++2(PO4)4(OH)2·8(H2O)

Comments: Brownish red aggregate of jahnsite-(MnMnMn).
Location: Stewart Mine, Near Pala, San Diego Co., California, USA. Scale: Specimen Size 8x5x4 mm.
© Sergey Vasiliev / Systematic Mineralogy

Jalpaite: Ag3CuS2

Comments: Tarnished black lustrous masses of jalpaite in rock with blue chrysocolla.
Location: La Mesa, Chihuahua, Mexico. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Jamborite: (Ni++,Ni+++,Fe)(OH)2(OH,S,(H2O))

Comments: Green coatings of jamborite on millerite filaments, in vug.
Location: Halls Gap, Lincoln County, Kentucky, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Jamesite: Pb2Zn2Fe+++5(AsO4)5O4  
Duftite-beta: PbCu(AsO4)(OH)

Comments: Reddish-brown bladed jamesite crystals overgrown with white dolomite and associated with dark green duftite.
Location: Tsumeb mine, Tsumeb, Otavi District, Oshikoto, Namibia. Scale: See Image.
© Rruff Database

Jamesonite: Pb4FeSb6S14

Comments: Metallic, hair-like, crystals of jamesonite on matrix.
Location: Baie Sprie (Felsobanya), Maraures, Romania. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Janhaugite: (Na,Ca)3(Mn++,Fe++)3(Ti++++,Zr,Nb)2Si4O15(OH,F,O)3  
Dalyite: K2ZrSi6O15

Comments: Tan crystalline dalyite (arrow) with reddish brown janhaugite.
Location: Gjerdingen, Nordmark, north of Oslo, Oslo, Norway. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Janhaugite: (Na,Ca)3(Mn++,Fe++)3(Ti++++,Zr,Nb)2Si4O15(OH,F,O)3

Comments: Reddish-brown columnar crystalline janhaugite in white matrix.
Location: Gjerdingen, Nordmark, north of Oslo, Oslo, Norway. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species