's Image Gallery

Hydromagnesite: Mg5(CO3)4(OH)2·4(H2O)  
Pokrovskite: Mg2(CO3)(OH)2·0.5(H2O)

Comments: Tan spherical pokrovskite on serpentinite rock with white hydromagnesite sprays.
Location: KCA Quarry, San Benito County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Hydroniumjarosite: (H3O)Fe+++3(SO4)2(OH)6

Comments: Yellow, earthy hydronium-jarosite.
Location: Reiche Zeche Mine, Himmelfahrt Mine, Freiberg, Freiberg District, Erzgebirge, Saxony, Germany. Scale: Specimen size 3.3 cm.
© Thomas Witzke / Abraxas-Verlag

Hydroscarbroite: Al14(CO3)3(OH)36·n(H2O)  
Scarbroite: Al5(CO3)(OH)13·5(H2O)

Comments: White to tan nodular hydroscarbroite intermixed with scarbroite in sandstone.
Location: Weston Favell, Northamptonshire, England. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Hydrotalcite: Mg6Al2(CO3)(OH)16·4(H2O)

Comments: Pearly white foliated masses of hydrotalcite on serpentinite rock.
Location: Snarum, Vikersund, Buskerud, Norway. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Hydrotungstite: H2WO4·(H2O)

Comments: Bright yellow crystalline crusts of hydrotungstite on matrix.
Location: Colquiri Mine, Colquiri, La Paz, Bolivia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Hydrowoodwardite: Cu1-xAlx(OH)2(SO4)x/2·n(H2O) with 0 < x < 0.67 and n > 3x/2

Comments: Massive blue to greenish-blue hydrowoodwardite.
Location: St Christoph Mine, Bärenhecke, Glashütte, Erzgebirge, Saxony, Germany. Scale: Specimen size 3.4 cm.
© Thomas Witzke / Abraxas-Verlag

Hydroxycancrinite: Na4(AlSiO4)3(OH)·(H2O)

Comments: Pale grayish-blue, massive hydroxycancrinite.
Location: Alluaiv Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture size 6 mm.
© Thomas Witzke / Abraxas-Verlag

Hydroxylbastnasite-(Ce): Ce(CO3)(OH)

Comments: Orangy brown hexagonal tablet of hydroxylbastnasite-(Ce).
Location: Trimouns, Luzenac, France. Scale: See Image.
© Rruff Database

Hydroxylclinohumite: Mg9(SiO4)4(OH,F)2

Comments: Deep red tabular hydroxylclinohumite crystal.
Location: Koksha Valley, Badakshan Province, Afghanistan. Scale: See Image.
© Rruff Database

Hydroxylherderite: CaBe(PO4)(OH)

Comments: Transparent crystals of hydroxylherderite.
Location: Lord Hill quarry, Stonehame, Oxford County, Maine, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Hydroxylpyromorphite: Pb5(PO4)3OH

Comments: Small crudely formed crystals of hydroxylpyromorphite on quartzite matrix, formed from alteration of galena.
Location: Mapleton, Brady Township, Hares Valley Area, Huntingdon Co., Pennsylvania, USA. Scale: Crystallite Size 0.15 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

Hydroxylwagnerite: Mg2(PO4)(OH)

Comments: Small cavity in white quartzite with several tan-colored hydroxylwagnerite crystals with red arrow pointing to the cavity.
Location: Dora Maira Massif, Val Varaita, Piedmont, Italy. Scale: Picture size 3 mm.
© John Betts - Fine Minerals

Hydrozincite: Zn5(CO3)2(OH)6

Comments: Well crystallized, colorless hydrozincite crystals encrusting a limonitic gossan matrix. Fluoresces bright blue-white under UV illumination.
Location: Ojuela mine, Mapimí, Mun. de Mapimí, Durango, Mexico. Scale: 3x3x2 cm.
© John Betts - Fine Minerals

Hypercinnabar: HgS

Comments: Black hypercinnaber, with dark red cinnabar, in calcite matrix.
Location: Manhattan District, Nye Co., Nevada, USA. Scale: Field of view 1 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

Hypersthene: (Mg,Fe++)2Si2O6  
Almandine: Fe++3Al2(SiO4)3

Comments: Dark green blocky crystals hypersthene with reddish almandine.
Location: Barton Garnet Mine, North Creek, Warren County, Adirondacks, New York, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Hyttsjoite: Pb18Ba2Ca5Mn++2Fe+++2Si30O90Cl·6(H2O)

Comments: B&W image of hyttsjoite (Hy) with quartz (Q), melanotekite (M), andradite (A), and a mixture of a mineral resembling talc with unidentified phases (T).
Location: Langban mines, Filipstad district, Varmland, Sweden (AmMin, v81:743). Scale: See Image.
© American Mineralogist

Ianthinite: (UO2)·5(UO3)·10(H2O)  
Schoepite: (UO2)8O2(OH)12·12(H2O)

Comments: Purple to brown resinous ianthinite with yellow schoepite and orange becquerelite.
Location: Colorado Plateau area, Saguache County, Colorado, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ice: H2O

Comments: White to clear crystals of ice formed on a window at -15 Deg. C.
Location: Minot, North Dakota, USA. Scale: Picture Size 30 cm.
© Dave Barthelmy

Ice: H2O

Comments: Classic snowflake (stellar dendrite ice crystal) formed from vapor-rich air between -10 to -22 deg C. Low Temperature Scanning Electron Microscope (LT-SEM) image with inset light microscope image.
Location: Unknown. Scale: Picture size 0.25 mm.
© Eric Erbe / Beltsville Agricultural Research Center

Ice: H2O

Comments: Rimed ice crystal. Composite column and plate crystal covered with tubercle deposits from contact with liquid water (supercooled fog). Low Temperature Scanning Electron Microscope (LT-SEM) image.
Location: Unknown. Scale: Picture size 1 mm.
© Eric Erbe / Beltsville Agricultural Research Center