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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